Exclude System.Runtime.CompilerServices.NullableContextAttribute (#66)

* HttpClient

* .

* .

* .

ProxyInterfaceSourceGenerator Solution.sln

@@ -32,6 +32,10 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ProxyInterfaceConsumerForAk
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ProxyInterfaceConsumerViaNuGet", "src-examples\ProxyInterfaceConsumerViaNuGet\ProxyInterfaceConsumerViaNuGet.csproj", "{1EA000E4-6103-4577-8D98-BDDA3BE458A2}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "IHttpClient", "src\IHttpClient\IHttpClient.csproj", "{38C2BB6E-EE23-4C4F-B8D5-A2AD592DE5E3}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConsoleAppIHttpClient", "src-examples\ConsoleAppIHttpClient\ConsoleAppIHttpClient.csproj", "{3E93C092-0E42-4200-B71A-5EEE410FE1F5}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -74,6 +78,18 @@ Global
 		{1EA000E4-6103-4577-8D98-BDDA3BE458A2}.DebugAttach|Any CPU.Build.0 = Debug|Any CPU
 		{1EA000E4-6103-4577-8D98-BDDA3BE458A2}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{1EA000E4-6103-4577-8D98-BDDA3BE458A2}.Release|Any CPU.Build.0 = Release|Any CPU
+		{38C2BB6E-EE23-4C4F-B8D5-A2AD592DE5E3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{38C2BB6E-EE23-4C4F-B8D5-A2AD592DE5E3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{38C2BB6E-EE23-4C4F-B8D5-A2AD592DE5E3}.DebugAttach|Any CPU.ActiveCfg = Debug|Any CPU
+		{38C2BB6E-EE23-4C4F-B8D5-A2AD592DE5E3}.DebugAttach|Any CPU.Build.0 = Debug|Any CPU
+		{38C2BB6E-EE23-4C4F-B8D5-A2AD592DE5E3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{38C2BB6E-EE23-4C4F-B8D5-A2AD592DE5E3}.Release|Any CPU.Build.0 = Release|Any CPU
+		{3E93C092-0E42-4200-B71A-5EEE410FE1F5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3E93C092-0E42-4200-B71A-5EEE410FE1F5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3E93C092-0E42-4200-B71A-5EEE410FE1F5}.DebugAttach|Any CPU.ActiveCfg = Debug|Any CPU
+		{3E93C092-0E42-4200-B71A-5EEE410FE1F5}.DebugAttach|Any CPU.Build.0 = Debug|Any CPU
+		{3E93C092-0E42-4200-B71A-5EEE410FE1F5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3E93C092-0E42-4200-B71A-5EEE410FE1F5}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -85,6 +101,8 @@ Global
 		{5F7DA2C5-B908-4B57-9F5F-BADF1216D89C} = {38BA087F-EDA1-4F8A-A140-85B84791B815}
 		{590908DF-A813-467A-94E4-3500020D0D54} = {38BA087F-EDA1-4F8A-A140-85B84791B815}
 		{1EA000E4-6103-4577-8D98-BDDA3BE458A2} = {38BA087F-EDA1-4F8A-A140-85B84791B815}
+		{38C2BB6E-EE23-4C4F-B8D5-A2AD592DE5E3} = {ED3DA9DD-1E07-444B-A2D7-2DBA280F96D4}
+		{3E93C092-0E42-4200-B71A-5EEE410FE1F5} = {38BA087F-EDA1-4F8A-A140-85B84791B815}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {585F071D-051D-441C-9C6B-226D9E15A1F5}

src-examples/ConsoleAppIHttpClient/ConsoleAppIHttpClient.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\IHttpClient\IHttpClient.csproj" />
+  </ItemGroup>
+
+</Project>

src-examples/ConsoleAppIHttpClient/Program.cs

@@ -0,0 +1,13 @@
+using System.Net.Http;
+using System.Net.Http.Json;
+
+var httpClient = new HttpClient();
+var httpClientProxy = new HttpClientProxy(httpClient);
+
+var result = await httpClientProxy.GetAsync("https://www.google.nl");
+var todo = await httpClientProxy.GetFromJsonAsync<Todo>("https://jsonplaceholder.typicode.com/todos/1");
+var postResult = await httpClientProxy.PostAsJsonAsync("https://jsonplaceholder.typicode.com/todos", new Todo { Id = 123 });
+var patchResult = await httpClientProxy.PatchAsJsonAsync("https://jsonplaceholder.typicode.com/todos", new Todo { Id = 400 });
+var putResult = await httpClientProxy.PutAsJsonAsync("https://jsonplaceholder.typicode.com/todos", new Todo { Id = 444 });
+
+int x = 0;

src-examples/ConsoleAppIHttpClient/Todo.cs

@@ -0,0 +1,4 @@
+public class Todo
+{
+    public int Id { get; set; }
+}

src-examples/ProxyInterfaceConsumer/Address.cs

@@ -1,6 +1,6 @@
 using System;
 
-namespace DifferentNamespace
+namespace ProxyInterfaceConsumer
 {
     public class Address
     {

src-examples/ProxyInterfaceConsumer/Http/IHttpClient.cs

@@ -1,14 +1,13 @@
-namespace ProxyInterfaceConsumer.Http
+using System.Net.Http;
+
+namespace ProxyInterfaceConsumer.Http;
+
+[ProxyInterfaceGenerator.Proxy(typeof(HttpClient), true)]
+public partial interface IHttpClient : IHttpMessageInvoker
 {
-    [ProxyInterfaceGenerator.Proxy(typeof(System.Net.Http.HttpClient), true)]
-    public partial interface IHttpClient : IHttpMessageInvoker
-    {
-        
-    }
+}
 
-    [ProxyInterfaceGenerator.Proxy(typeof(System.Net.Http.HttpMessageInvoker))]
-    public partial interface IHttpMessageInvoker
-    {
-
-    }
+[ProxyInterfaceGenerator.Proxy(typeof(HttpMessageInvoker))]
+public partial interface IHttpMessageInvoker
+{
 }

src-examples/ProxyInterfaceConsumer/Http/IHttpClientExtensions.cs

@@ -0,0 +1,108 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.Net.Http;
+using System.Net.Http.Json;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using System.Text.Json.Serialization.Metadata;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace ProxyInterfaceConsumer.Http;
+
+public static class IHttpClientExtensions
+{
+    #region PostAsJsonAsync
+    public static Task<HttpResponseMessage> PostAsJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, TValue value, JsonSerializerOptions? options = null, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PostAsJsonAsync(requestUri, value, options, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PostAsJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, TValue value, JsonSerializerOptions? options = null, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PostAsJsonAsync(requestUri, value, options, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PostAsJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, TValue value, CancellationToken cancellationToken)
+    {
+        return client._Instance.PostAsJsonAsync(requestUri, value, options: null, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PostAsJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, TValue value, CancellationToken cancellationToken)
+    {
+        return client._Instance.PostAsJsonAsync(requestUri, value, options: null, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PostAsJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, TValue value, JsonTypeInfo<TValue> jsonTypeInfo, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PostAsJsonAsync(requestUri, value, jsonTypeInfo, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PostAsJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, TValue value, JsonTypeInfo<TValue> jsonTypeInfo, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PostAsJsonAsync(requestUri, value, jsonTypeInfo, cancellationToken);
+    }
+    #endregion
+
+    #region GetFromJsonAsync
+    public static Task<object?> GetFromJsonAsync(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, Type type, JsonSerializerOptions? options, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, type, options, cancellationToken);
+    }
+
+    public static Task<object?> GetFromJsonAsync(this IHttpClient client, Uri? requestUri, Type type, JsonSerializerOptions? options, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, type, options, cancellationToken);
+    }
+
+    public static Task<TValue?> GetFromJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, JsonSerializerOptions? options, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync<TValue>(requestUri, options, cancellationToken);
+    }
+
+    public static Task<TValue?> GetFromJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, JsonSerializerOptions? options, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync<TValue>(requestUri, options, cancellationToken);
+    }
+
+    public static Task<object?> GetFromJsonAsync(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, Type type, JsonSerializerContext context, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, type, context, cancellationToken);
+    }
+
+    public static Task<object?> GetFromJsonAsync(this IHttpClient client, Uri? requestUri, Type type, JsonSerializerContext context, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, type, context, cancellationToken);
+    }
+
+    public static Task<TValue?> GetFromJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, JsonTypeInfo<TValue> jsonTypeInfo, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, jsonTypeInfo, cancellationToken);
+    }
+
+    public static Task<TValue?> GetFromJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, JsonTypeInfo<TValue> jsonTypeInfo, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, jsonTypeInfo, cancellationToken);
+    }
+
+    public static Task<object?> GetFromJsonAsync(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, Type type, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, type, options: null, cancellationToken);
+    }
+
+    public static Task<object?> GetFromJsonAsync(this IHttpClient client, Uri? requestUri, Type type, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, type, options: null, cancellationToken);
+    }
+
+    public static Task<TValue?> GetFromJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync<TValue>(requestUri, cancellationToken);
+    }
+
+    public static Task<TValue?> GetFromJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync<TValue>(requestUri, cancellationToken);
+    }
+    #endregion
+}

src-examples/ProxyInterfaceConsumer/IAddress.cs

@@ -1,5 +1,3 @@
-using DifferentNamespace;
-
 namespace ProxyInterfaceConsumer
 {
     [ProxyInterfaceGenerator.Proxy(typeof(Address))]

src-examples/ProxyInterfaceConsumer/Person.cs

@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 using System.Threading.Tasks;
-using DifferentNamespace;
 
 namespace ProxyInterfaceConsumer
 {
@@ -71,12 +70,12 @@ namespace ProxyInterfaceConsumer
             c++;
         }
 
-        public int In_Out_Ref2(in Address a, out Address b, ref Address c)
-        {
-            b = new Address();
-            c.HouseNumber = 11;
-            return 404;
-        }
+        //public int In_Out_Ref2(in Address a, out Address b, ref Address c)
+        //{
+        //    b = new Address();
+        //    c.HouseNumber = 11;
+        //    return 404;
+        //}
 
         public void Void()
         {

src-examples/ProxyInterfaceConsumer/Program.cs

@@ -1,86 +1,101 @@
 using System;
 using System.Collections.Generic;
+using System.Net.Http;
+using System.Net.Http.Json;
 using System.Text.Json;
-using DifferentNamespace;
+using System.Threading.Tasks;
+using ProxyInterfaceConsumer.Http;
 
-namespace ProxyInterfaceConsumer
+namespace ProxyInterfaceConsumer;
+
+public class Program
 {
-    public class Program
+    private static JsonSerializerOptions JsonSerializerOptions = new ()
     {
-        private static JsonSerializerOptions JsonSerializerOptions = new ()
+        WriteIndented = true
+    };
+
+    public static async Task Main()
+    {
+        var h = new HttpClient();
+        var ph = new HttpClientProxy(h);
+
+        var result = await ph.GetAsync("https://www.google.nl");
+        var todo = await ph.GetFromJsonAsync<Todo>("https://jsonplaceholder.typicode.com/todos/1");
+
+        var postResult = await h.PostAsJsonAsync<Todo>("https://jsonplaceholder.typicode.com/todos", new Todo { Id = 123 });
+
+        var t = new TestProxy(new Test());
+
+        IPersonT<int> pT = new PersonTProxy<int>(new PersonT<int>());
+        pT.TVal = 1;
+        Console.WriteLine(JsonSerializer.Serialize(pT, JsonSerializerOptions));
+        Console.WriteLine(new string('-', 80));
+
+        //IPersonTT<int, Program> pTT = new PersonTTProxy<int, Program>(new PersonTT<int, Program>());
+        //pTT.TVal1 = 42;
+        //pTT.TVal2 = new Program();
+        //Console.WriteLine(JsonSerializer.Serialize(pTT, JsonSerializerOptions));
+        //Console.WriteLine(new string('-', 80));
+
+        var ap = new AddressProxy(new Address { HouseNumber = 42 });
+        ap.HouseNumber = -1;
+        ap.MyEvent += delegate (object x, EventArgs a)
         {
-            WriteIndented = true
         };
 
-        public static void Main()
-        {
-            var t = new TestProxy(new Test());
+        IPerson p = new PersonProxy(new Person());
+        p.Name = "test";
+        p.HelloWorld("stef");
+        // p.Address = ap;
 
-            IPersonT<int> pT = new PersonTProxy<int>(new PersonT<int>());
-            pT.TVal = 1;
-            Console.WriteLine(JsonSerializer.Serialize(pT, JsonSerializerOptions));
-            Console.WriteLine(new string('-', 80));
+        Console.WriteLine("DefaultValue " + p.DefaultValue());
+        Console.WriteLine("DefaultValue " + p.DefaultValue(42));
 
-            //IPersonTT<int, Program> pTT = new PersonTTProxy<int, Program>(new PersonTT<int, Program>());
-            //pTT.TVal1 = 42;
-            //pTT.TVal2 = new Program();
-            //Console.WriteLine(JsonSerializer.Serialize(pTT, JsonSerializerOptions));
-            //Console.WriteLine(new string('-', 80));
-
-            var ap = new AddressProxy(new Address { HouseNumber = 42 });
-            ap.HouseNumber = -1;
-            ap.MyEvent += delegate (object x, EventArgs a)
-            {
-            };
-
-            IPerson p = new PersonProxy(new Person());
-            p.Name = "test";
-            p.HelloWorld("stef");
-            // p.Address = ap;
-
-            Console.WriteLine("DefaultValue " + p.DefaultValue());
-            Console.WriteLine("DefaultValue " + p.DefaultValue(42));
-
-            Console.WriteLine(JsonSerializer.Serialize(p, JsonSerializerOptions));
-        }
+        Console.WriteLine(JsonSerializer.Serialize(p, JsonSerializerOptions));
     }
+}
 
-    public class Test
+public class Todo
+{
+    public int Id { get; set; }
+}
+
+public class Test
+{
+    public int Id { get; set; }
+
+    public Clazz C { get; }
+
+    public IList<Clazz> Cs { get; set; }
+
+    public int AddString(string s)
     {
-        public int Id { get; set; }
-
-        public Clazz C { get; }
-
-        public IList<Clazz> Cs { get; set; }
-
-        public int AddString(string s)
-        {
-            return 600;
-        }
-
-        public Test AddTest(Test t)
-        {
-            return new Test();
-        }
-
-        public Clazz AddClazz(Clazz c)
-        {
-            return new Clazz();
-        }
+        return 600;
     }
 
-    public sealed class Clazz
+    public Test AddTest(Test t)
     {
-        public string Name { get; set; }
+        return new Test();
     }
 
-    [ProxyInterfaceGenerator.Proxy(typeof(Test))]
-    public partial interface ITest
+    public Clazz AddClazz(Clazz c)
     {
+        return new Clazz();
     }
+}
 
-    [ProxyInterfaceGenerator.Proxy(typeof(Clazz))]
-    public partial interface IClazz
-    {
-    }
+public sealed class Clazz
+{
+    public string Name { get; set; }
+}
+
+[ProxyInterfaceGenerator.Proxy(typeof(Test))]
+public partial interface ITest
+{
+}
+
+[ProxyInterfaceGenerator.Proxy(typeof(Clazz))]
+public partial interface IClazz
+{
 }

src-examples/ProxyInterfaceConsumer/ProxyInterfaceConsumer - Backup.csproj

@@ -1,33 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-    <PropertyGroup>
-        <TargetFramework>net7.0</TargetFramework>
-        <OutputType>Exe</OutputType>
-        <Nullable>enable</Nullable>
-    </PropertyGroup>
-
-    <ItemGroup>
-        <Compile Remove="IPersonTT.cs" />
-        <Compile Remove="PersonTT.cs" />
-    </ItemGroup>
-
-    <ItemGroup>
-        <PackageReference Include="AutoMapper" Version="10.1.1" />
-        <PackageReference Include="Mapster" Version="7.3.0" />
-        <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.3">
-            <PrivateAssets>all</PrivateAssets>
-            <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-        </PackageReference>
-        <PackageReference Include="Microsoft.CodeAnalysis.Common" Version="3.10.0" />
-        <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.10.0" />
-    </ItemGroup>
-
-    <ItemGroup>
-        <ProjectReference Include="..\..\src\ProxyInterfaceSourceGenerator\ProxyInterfaceSourceGenerator.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
-    </ItemGroup>
-
-    <ItemGroup>
-      <Folder Include="NewFolder\" />
-    </ItemGroup>
-
-</Project>

src/IHttpClient/IHttpClient.cs

@@ -0,0 +1,7 @@
+// ReSharper disable once CheckNamespace
+namespace System.Net.Http;
+
+[ProxyInterfaceGenerator.Proxy(typeof(HttpClient), true)]
+public partial interface IHttpClient : IHttpMessageInvoker
+{
+}

src/IHttpClient/IHttpClient.csproj

@@ -0,0 +1,54 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <Version>0.0.1-preview-01</Version>
+        <TargetFrameworks>netstandard2.1;net6.0;net7.0;net8.0</TargetFrameworks>
+        <Nullable>enable</Nullable>
+        <LangVersion>latest</LangVersion>
+        <ProjectGuid>{38C2BB6E-EE23-4C4F-B8D5-A2AD592DE5E3}</ProjectGuid>
+        <Authors>Stef Heyenrath</Authors>
+        <Description></Description>
+        <Title>IHttpClient</Title>
+        <PackageId>IHttpClient</PackageId>
+        <Description>This project uses source generation to generate an IHttpClient interface and HttpClientProxy from the HttpClient to make it injectable and unit-testable.</Description>
+        <PackageTags>HttpClient;interface;IHttpClient;Proxy;HttpClientProxy</PackageTags>
+        <PackageLicenseExpression>MIT</PackageLicenseExpression>
+        <!--<PackageReleaseNotes>$([System.IO.File]::ReadAllText("$(MSBuildProjectDirectory)/../../PackageReleaseNotes.txt"))</PackageReleaseNotes>-->
+        <PackageProjectUrl>https://github.com/StefH/ProxyInterfaceGenerator/src/IHttpClient</PackageProjectUrl>
+        <RepositoryType>git</RepositoryType>
+        <RepositoryUrl>https://github.com/StefH/ProxyInterfaceGenerator/src/IHttpClient</RepositoryUrl>
+        <PackageReadmeFile>PackageReadme.md</PackageReadmeFile>
+        <PackageIcon>ihttpclient-icon.png</PackageIcon>
+        <!--<IncludeBuildOutput>false</IncludeBuildOutput>
+        <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
+        <CompilerGeneratedFilesOutputPath>$(BaseIntermediateOutputPath)Generated</CompilerGeneratedFilesOutputPath>
+        <DevelopmentDependency>true</DevelopmentDependency>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Configurations>Debug;Release</Configurations>-->
+    </PropertyGroup>
+
+    <PropertyGroup Condition="'$(Configuration)' == 'Release'">
+        <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <None Include="../../resources/ihttpclient-icon.png" Pack="true" PackagePath="" />
+        <None Include="PackageReadme.md" Pack="true" PackagePath="" />
+    </ItemGroup>
+
+    <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.1' or '$(TargetFramework)' == 'net6.0' ">
+        <PackageReference Include="System.Net.Http.Json" Version="6.0.0" />
+        <PackageReference Include="StringSyntaxPolyfill" Version="1.1.0" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0">
+        <PrivateAssets>all</PrivateAssets>
+        <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      </PackageReference>
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\ProxyInterfaceSourceGenerator\ProxyInterfaceSourceGenerator.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
+    </ItemGroup>
+</Project>

src/IHttpClient/IHttpClientJsonExtensions.cs

@@ -0,0 +1,173 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using System.Text.Json.Serialization.Metadata;
+using System.Threading;
+using System.Threading.Tasks;
+
+// ReSharper disable once CheckNamespace
+namespace System.Net.Http.Json;
+
+/// <inheritdoc cref="HttpClientJsonExtensions"/>
+public static class IHttpClientJsonExtensions
+{
+    #region PostAsJsonAsync
+    public static Task<HttpResponseMessage> PostAsJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, TValue value, JsonSerializerOptions? options = null, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PostAsJsonAsync(requestUri, value, options, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PostAsJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, TValue value, JsonSerializerOptions? options = null, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PostAsJsonAsync(requestUri, value, options, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PostAsJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, TValue value, CancellationToken cancellationToken)
+    {
+        return client._Instance.PostAsJsonAsync(requestUri, value, options: null, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PostAsJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, TValue value, CancellationToken cancellationToken)
+    {
+        return client._Instance.PostAsJsonAsync(requestUri, value, options: null, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PostAsJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, TValue value, JsonTypeInfo<TValue> jsonTypeInfo, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PostAsJsonAsync(requestUri, value, jsonTypeInfo, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PostAsJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, TValue value, JsonTypeInfo<TValue> jsonTypeInfo, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PostAsJsonAsync(requestUri, value, jsonTypeInfo, cancellationToken);
+    }
+    #endregion
+
+#if NET7_0_OR_GREATER
+    #region PatchAsJsonAsync
+    public static Task<HttpResponseMessage> PatchAsJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, TValue value, JsonSerializerOptions? options = null, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PatchAsJsonAsync(requestUri, value, options, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PatchAsJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, TValue value, JsonSerializerOptions? options = null, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PatchAsJsonAsync(requestUri, value, options, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PatchAsJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, TValue value, CancellationToken cancellationToken)
+    {
+        return client._Instance.PatchAsJsonAsync(requestUri, value, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PatchAsJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, TValue value, CancellationToken cancellationToken)
+    {
+        return client._Instance.PatchAsJsonAsync(requestUri, value, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PatchAsJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, TValue value, JsonTypeInfo<TValue> jsonTypeInfo, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PatchAsJsonAsync(requestUri, value, jsonTypeInfo, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PatchAsJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, TValue value, JsonTypeInfo<TValue> jsonTypeInfo, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PatchAsJsonAsync(requestUri, value, jsonTypeInfo, cancellationToken);
+    }
+#endregion
+#endif
+    
+    #region PutAsJsonAsync
+    public static Task<HttpResponseMessage> PutAsJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, TValue value, JsonSerializerOptions? options = null, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PutAsJsonAsync(requestUri, value, options, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PutAsJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, TValue value, JsonSerializerOptions? options = null, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PutAsJsonAsync(requestUri, value, options, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PutAsJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, TValue value, CancellationToken cancellationToken)
+    {
+        return client._Instance.PutAsJsonAsync(requestUri, value, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PutAsJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, TValue value, CancellationToken cancellationToken)
+    {
+        return client._Instance.PutAsJsonAsync(requestUri, value, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PutAsJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, TValue value, JsonTypeInfo<TValue> jsonTypeInfo, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PutAsJsonAsync(requestUri, value, jsonTypeInfo, cancellationToken);
+    }
+
+    public static Task<HttpResponseMessage> PutAsJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, TValue value, JsonTypeInfo<TValue> jsonTypeInfo, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.PutAsJsonAsync(requestUri, value, jsonTypeInfo, cancellationToken);
+    }
+    #endregion
+
+    #region GetFromJsonAsync
+    public static Task<object?> GetFromJsonAsync(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, Type type, JsonSerializerOptions? options, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, type, options, cancellationToken);
+    }
+
+    public static Task<object?> GetFromJsonAsync(this IHttpClient client, Uri? requestUri, Type type, JsonSerializerOptions? options, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, type, options, cancellationToken);
+    }
+
+    public static Task<TValue?> GetFromJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, JsonSerializerOptions? options, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync<TValue>(requestUri, options, cancellationToken);
+    }
+
+    public static Task<TValue?> GetFromJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, JsonSerializerOptions? options, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync<TValue>(requestUri, options, cancellationToken);
+    }
+
+    public static Task<object?> GetFromJsonAsync(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, Type type, JsonSerializerContext context, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, type, context, cancellationToken);
+    }
+
+    public static Task<object?> GetFromJsonAsync(this IHttpClient client, Uri? requestUri, Type type, JsonSerializerContext context, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, type, context, cancellationToken);
+    }
+
+    public static Task<TValue?> GetFromJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, JsonTypeInfo<TValue> jsonTypeInfo, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, jsonTypeInfo, cancellationToken);
+    }
+
+    public static Task<TValue?> GetFromJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, JsonTypeInfo<TValue> jsonTypeInfo, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, jsonTypeInfo, cancellationToken);
+    }
+
+    public static Task<object?> GetFromJsonAsync(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, Type type, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, type, options: null, cancellationToken);
+    }
+
+    public static Task<object?> GetFromJsonAsync(this IHttpClient client, Uri? requestUri, Type type, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync(requestUri, type, options: null, cancellationToken);
+    }
+
+    public static Task<TValue?> GetFromJsonAsync<TValue>(this IHttpClient client, [StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync<TValue>(requestUri, cancellationToken);
+    }
+
+    public static Task<TValue?> GetFromJsonAsync<TValue>(this IHttpClient client, Uri? requestUri, CancellationToken cancellationToken = default)
+    {
+        return client._Instance.GetFromJsonAsync<TValue>(requestUri, cancellationToken);
+    }
+    #endregion
+}

src/IHttpClient/IHttpMessageInvoker.cs

@@ -0,0 +1,7 @@
+// ReSharper disable once CheckNamespace
+namespace System.Net.Http;
+
+[ProxyInterfaceGenerator.Proxy(typeof(HttpMessageInvoker))]
+public partial interface IHttpMessageInvoker
+{
+}

src/IHttpClient/PackageReadme.md

@@ -0,0 +1,17 @@
+## Info
+
+This project uses source generation to generate an `IHttpClient` interface and `HttpClientProxy` from the `HttpClient` to make it injectable and unit-testable.
+
+All the methods and properties from the `HttpClient` are replicated to `IHttpClient`.
+
+## Use it
+``` c#
+HttpClient httpClient = new HttpClient();
+IHttpClient httpClientProxy = new HttpClientProxy(httpClient); 
+
+var result = await httpClientProxy.GetAsync("https://www.google.nl");
+var todo = await httpClientProxy.GetFromJsonAsync<Todo>("https://jsonplaceholder.typicode.com/todos/1");
+var postResult = await httpClientProxy.PostAsJsonAsync("https://jsonplaceholder.typicode.com/todos", new Todo { Id = 123 });
+var patchResult = await httpClientProxy.PatchAsJsonAsync("https://jsonplaceholder.typicode.com/todos", new Todo { Id = 400 });
+var putResult = await httpClientProxy.PutAsJsonAsync("https://jsonplaceholder.typicode.com/todos", new Todo { Id = 444 });
+```

src/ProxyInterfaceSourceGenerator/Constants/InternalClassNames.cs

@@ -1,8 +0,0 @@
-namespace ProxyInterfaceSourceGenerator.Constants;
-
-internal static class InternalClassNames
-{
-    public const string NullableAttribute = "System.Runtime.CompilerServices.NullableAttribute";
-
-    public const string AsyncStateMachineAttribute = "System.Runtime.CompilerServices.AsyncStateMachineAttribute";
-}

src/ProxyInterfaceSourceGenerator/Extensions/SymbolExtensions.cs

@@ -1,6 +1,5 @@
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp;
-using ProxyInterfaceSourceGenerator.Constants;
 
 namespace ProxyInterfaceSourceGenerator.Extensions;
 
@@ -8,8 +7,9 @@ internal static class SymbolExtensions
 {
     private static readonly string[] ExcludedAttributes =
     {
-        InternalClassNames.AsyncStateMachineAttribute ,
-        InternalClassNames.NullableAttribute
+        "System.Runtime.CompilerServices.NullableAttribute",
+        "System.Runtime.CompilerServices.NullableContextAttribute",
+        "System.Runtime.CompilerServices.AsyncStateMachineAttribute"
     };
 
     public static string GetAttributesPrefix(this ISymbol symbol)

src/ProxyInterfaceSourceGenerator/FileGenerators/ProxyClassesGenerator.cs

@@ -198,7 +198,10 @@ using System;
     private string GeneratePublicMethods(ClassSymbol targetClassSymbol, bool proxyBaseClasses)
     {
         var str = new StringBuilder();
-        foreach (var method in MemberHelper.GetPublicMethods(targetClassSymbol, proxyBaseClasses))
+
+        var methods = MemberHelper.GetPublicMethods(targetClassSymbol, proxyBaseClasses);
+
+        foreach (var method in methods)
         {
             var methodParameters = new List<string>();
             var invokeParameters = new List<string>();

src/ProxyInterfaceSourceGenerator/ProxyInterfaceSourceGenerator.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <Version>0.0.36</Version>
+        <Version>0.0.37</Version>
         <TargetFramework>netstandard2.0</TargetFramework>
         <ProjectGuid>{12344228-91F4-4502-9595-39584E5ABB34}</ProjectGuid>
         <LangVersion>10</LangVersion>

src/ProxyInterfaceSourceGenerator/Utils/MemberHelper.cs

@@ -92,7 +92,7 @@ internal static class MemberHelper
         }
 
         var ownMembers = membersQuery.ToList();
-        var ownPropertyNames = ownMembers.Select(x => x.Name);
+        var ownMemberNames = ownMembers.Select(x => x.Name);
 
         if (!proxyBaseClasses)
         {
@@ -106,7 +106,7 @@ internal static class MemberHelper
         {
             var baseMembers = baseType.GetMembers().OfType<T>()
                 .Where(m => m.DeclaredAccessibility == Accessibility.Public)
-                .Where(x => !ownPropertyNames.Contains(x.Name));
+                .Where(x => !ownMemberNames.Contains(x.Name));
 
             foreach (var filter in filters)
             {

tests/ProxyInterfaceSourceGeneratorTests/Destination/ProxyInterfaceSourceGeneratorTests.Source.HumanProxy.g.cs

@@ -23,6 +23,11 @@ namespace ProxyInterfaceSourceGeneratorTests.Source
 
 
 
+        public void Dispose()
+        {
+            _Instance.Dispose();
+        }
+
 
 
 

tests/ProxyInterfaceSourceGeneratorTests/Destination/ProxyInterfaceSourceGeneratorTests.Source.IHttpClient.g.cs

@@ -0,0 +1,134 @@
+//----------------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by https://github.com/StefH/ProxyInterfaceSourceGenerator.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//----------------------------------------------------------------------------------------
+
+#nullable enable
+using System;
+
+namespace ProxyInterfaceSourceGeneratorTests.Source
+{
+    public partial interface IHttpClient
+    {
+        new System.Net.Http.HttpClient _Instance { get; }
+
+        System.Net.IWebProxy DefaultProxy { get; set; }
+
+        System.Net.Http.Headers.HttpRequestHeaders DefaultRequestHeaders { get; }
+
+        System.Version DefaultRequestVersion { get; set; }
+
+        System.Net.Http.HttpVersionPolicy DefaultVersionPolicy { get; set; }
+
+        System.Uri? BaseAddress { get; set; }
+
+        System.TimeSpan Timeout { get; set; }
+
+        long MaxResponseContentBufferSize { get; set; }
+
+
+
+        System.Threading.Tasks.Task<string> GetStringAsync(string? requestUri);
+
+        System.Threading.Tasks.Task<string> GetStringAsync(System.Uri? requestUri);
+
+        System.Threading.Tasks.Task<string> GetStringAsync(string? requestUri, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<string> GetStringAsync(System.Uri? requestUri, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<byte[]> GetByteArrayAsync(string? requestUri);
+
+        System.Threading.Tasks.Task<byte[]> GetByteArrayAsync(System.Uri? requestUri);
+
+        System.Threading.Tasks.Task<byte[]> GetByteArrayAsync(string? requestUri, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<byte[]> GetByteArrayAsync(System.Uri? requestUri, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.IO.Stream> GetStreamAsync(string? requestUri);
+
+        System.Threading.Tasks.Task<System.IO.Stream> GetStreamAsync(string? requestUri, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.IO.Stream> GetStreamAsync(System.Uri? requestUri);
+
+        System.Threading.Tasks.Task<System.IO.Stream> GetStreamAsync(System.Uri? requestUri, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(string? requestUri);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(System.Uri? requestUri);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(string? requestUri, System.Net.Http.HttpCompletionOption completionOption);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(System.Uri? requestUri, System.Net.Http.HttpCompletionOption completionOption);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(string? requestUri, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(System.Uri? requestUri, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(string? requestUri, System.Net.Http.HttpCompletionOption completionOption, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(System.Uri? requestUri, System.Net.Http.HttpCompletionOption completionOption, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PostAsync(string? requestUri, System.Net.Http.HttpContent? content);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PostAsync(System.Uri? requestUri, System.Net.Http.HttpContent? content);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PostAsync(string? requestUri, System.Net.Http.HttpContent? content, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PostAsync(System.Uri? requestUri, System.Net.Http.HttpContent? content, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PutAsync(string? requestUri, System.Net.Http.HttpContent? content);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PutAsync(System.Uri? requestUri, System.Net.Http.HttpContent? content);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PutAsync(string? requestUri, System.Net.Http.HttpContent? content, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PutAsync(System.Uri? requestUri, System.Net.Http.HttpContent? content, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PatchAsync(string? requestUri, System.Net.Http.HttpContent? content);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PatchAsync(System.Uri? requestUri, System.Net.Http.HttpContent? content);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PatchAsync(string? requestUri, System.Net.Http.HttpContent? content, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PatchAsync(System.Uri? requestUri, System.Net.Http.HttpContent? content, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> DeleteAsync(string? requestUri);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> DeleteAsync(System.Uri? requestUri);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> DeleteAsync(string? requestUri, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> DeleteAsync(System.Uri? requestUri, System.Threading.CancellationToken cancellationToken);
+
+        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request);
+
+        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request, System.Net.Http.HttpCompletionOption completionOption);
+
+        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken);
+
+        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request, System.Net.Http.HttpCompletionOption completionOption, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> SendAsync(System.Net.Http.HttpRequestMessage request);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> SendAsync(System.Net.Http.HttpRequestMessage request, System.Net.Http.HttpCompletionOption completionOption);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> SendAsync(System.Net.Http.HttpRequestMessage request, System.Net.Http.HttpCompletionOption completionOption, System.Threading.CancellationToken cancellationToken);
+
+        void CancelPendingRequests();
+
+
+
+
+    }
+}
+#nullable restore

tests/ProxyInterfaceSourceGeneratorTests/Destination/ProxyInterfaceSourceGeneratorTests.Source.IHttpMessageInvoker.g.cs

@@ -0,0 +1,33 @@
+//----------------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by https://github.com/StefH/ProxyInterfaceSourceGenerator.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//----------------------------------------------------------------------------------------
+
+#nullable enable
+using System;
+
+namespace ProxyInterfaceSourceGeneratorTests.Source
+{
+    public partial interface IHttpMessageInvoker
+    {
+        System.Net.Http.HttpMessageInvoker _Instance { get; }
+
+
+
+        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken);
+
+        System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken);
+
+        void Dispose();
+
+
+
+
+    }
+}
+#nullable restore

tests/ProxyInterfaceSourceGeneratorTests/Destination/ProxyInterfaceSourceGeneratorTests.Source.IHuman.g.cs

@@ -22,6 +22,8 @@ namespace ProxyInterfaceSourceGeneratorTests.Source
 
 
 
+        void Dispose();
+
 
 
 

tests/ProxyInterfaceSourceGeneratorTests/Destination/ProxyInterfaceSourceGeneratorTests.Source.IPersonExtends.g.cs

@@ -54,6 +54,8 @@ namespace ProxyInterfaceSourceGeneratorTests.Source
 
         System.Threading.Tasks.Task<string?> Method3Async();
 
+        void Dispose();
+
 
 
 

tests/ProxyInterfaceSourceGeneratorTests/Destination/ProxyInterfaceSourceGeneratorTests.Source.PersonExtendsProxy.g.cs

@@ -108,6 +108,11 @@ namespace ProxyInterfaceSourceGeneratorTests.Source
             return result__57684656;
         }
 
+        public void Dispose()
+        {
+            _Instance.Dispose();
+        }
+
 
 
 

tests/ProxyInterfaceSourceGeneratorTests/Destination/System.Net.Http.HttpClientProxy.g.cs

@@ -0,0 +1,410 @@
+//----------------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by https://github.com/StefH/ProxyInterfaceSourceGenerator.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//----------------------------------------------------------------------------------------
+
+#nullable enable
+using System;
+
+namespace ProxyInterfaceSourceGeneratorTests.Source
+{
+    public partial class HttpClientProxy : ProxyInterfaceSourceGeneratorTests.Source.HttpMessageInvokerProxy, IHttpClient
+    {
+        public new System.Net.Http.HttpClient _Instance { get; }
+        public System.Net.Http.HttpMessageInvoker _InstanceHttpMessageInvoker { get; }
+
+        public System.Net.IWebProxy DefaultProxy { get => System.Net.Http.HttpClient.DefaultProxy; set => System.Net.Http.HttpClient.DefaultProxy = value; }
+
+        public System.Net.Http.Headers.HttpRequestHeaders DefaultRequestHeaders { get => _Instance.DefaultRequestHeaders; }
+
+        public System.Version DefaultRequestVersion { get => _Instance.DefaultRequestVersion; set => _Instance.DefaultRequestVersion = value; }
+
+        public System.Net.Http.HttpVersionPolicy DefaultVersionPolicy { get => _Instance.DefaultVersionPolicy; set => _Instance.DefaultVersionPolicy = value; }
+
+        public System.Uri? BaseAddress { get => _Instance.BaseAddress; set => _Instance.BaseAddress = value; }
+
+        public System.TimeSpan Timeout { get => _Instance.Timeout; set => _Instance.Timeout = value; }
+
+        public long MaxResponseContentBufferSize { get => _Instance.MaxResponseContentBufferSize; set => _Instance.MaxResponseContentBufferSize = value; }
+
+
+
+        public System.Threading.Tasks.Task<string> GetStringAsync(string? requestUri)
+        {
+            string? requestUri_ = requestUri;
+            var result_1347886741 = _Instance.GetStringAsync(requestUri_);
+            return result_1347886741;
+        }
+
+        public System.Threading.Tasks.Task<string> GetStringAsync(System.Uri? requestUri)
+        {
+            System.Uri? requestUri_ = requestUri;
+            var result_1347886741 = _Instance.GetStringAsync(requestUri_);
+            return result_1347886741;
+        }
+
+        public System.Threading.Tasks.Task<string> GetStringAsync(string? requestUri, System.Threading.CancellationToken cancellationToken)
+        {
+            string? requestUri_ = requestUri;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result_1347886741 = _Instance.GetStringAsync(requestUri_, cancellationToken_);
+            return result_1347886741;
+        }
+
+        public System.Threading.Tasks.Task<string> GetStringAsync(System.Uri? requestUri, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Uri? requestUri_ = requestUri;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result_1347886741 = _Instance.GetStringAsync(requestUri_, cancellationToken_);
+            return result_1347886741;
+        }
+
+        public System.Threading.Tasks.Task<byte[]> GetByteArrayAsync(string? requestUri)
+        {
+            string? requestUri_ = requestUri;
+            var result__1359336953 = _Instance.GetByteArrayAsync(requestUri_);
+            return result__1359336953;
+        }
+
+        public System.Threading.Tasks.Task<byte[]> GetByteArrayAsync(System.Uri? requestUri)
+        {
+            System.Uri? requestUri_ = requestUri;
+            var result__1359336953 = _Instance.GetByteArrayAsync(requestUri_);
+            return result__1359336953;
+        }
+
+        public System.Threading.Tasks.Task<byte[]> GetByteArrayAsync(string? requestUri, System.Threading.CancellationToken cancellationToken)
+        {
+            string? requestUri_ = requestUri;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result__1359336953 = _Instance.GetByteArrayAsync(requestUri_, cancellationToken_);
+            return result__1359336953;
+        }
+
+        public System.Threading.Tasks.Task<byte[]> GetByteArrayAsync(System.Uri? requestUri, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Uri? requestUri_ = requestUri;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result__1359336953 = _Instance.GetByteArrayAsync(requestUri_, cancellationToken_);
+            return result__1359336953;
+        }
+
+        public System.Threading.Tasks.Task<System.IO.Stream> GetStreamAsync(string? requestUri)
+        {
+            string? requestUri_ = requestUri;
+            var result_355326142 = _Instance.GetStreamAsync(requestUri_);
+            return result_355326142;
+        }
+
+        public System.Threading.Tasks.Task<System.IO.Stream> GetStreamAsync(string? requestUri, System.Threading.CancellationToken cancellationToken)
+        {
+            string? requestUri_ = requestUri;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result_355326142 = _Instance.GetStreamAsync(requestUri_, cancellationToken_);
+            return result_355326142;
+        }
+
+        public System.Threading.Tasks.Task<System.IO.Stream> GetStreamAsync(System.Uri? requestUri)
+        {
+            System.Uri? requestUri_ = requestUri;
+            var result_355326142 = _Instance.GetStreamAsync(requestUri_);
+            return result_355326142;
+        }
+
+        public System.Threading.Tasks.Task<System.IO.Stream> GetStreamAsync(System.Uri? requestUri, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Uri? requestUri_ = requestUri;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result_355326142 = _Instance.GetStreamAsync(requestUri_, cancellationToken_);
+            return result_355326142;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(string? requestUri)
+        {
+            string? requestUri_ = requestUri;
+            var result_1805284658 = _Instance.GetAsync(requestUri_);
+            return result_1805284658;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(System.Uri? requestUri)
+        {
+            System.Uri? requestUri_ = requestUri;
+            var result_1805284658 = _Instance.GetAsync(requestUri_);
+            return result_1805284658;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(string? requestUri, System.Net.Http.HttpCompletionOption completionOption)
+        {
+            string? requestUri_ = requestUri;
+            System.Net.Http.HttpCompletionOption completionOption_ = completionOption;
+            var result_1805284658 = _Instance.GetAsync(requestUri_, completionOption_);
+            return result_1805284658;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(System.Uri? requestUri, System.Net.Http.HttpCompletionOption completionOption)
+        {
+            System.Uri? requestUri_ = requestUri;
+            System.Net.Http.HttpCompletionOption completionOption_ = completionOption;
+            var result_1805284658 = _Instance.GetAsync(requestUri_, completionOption_);
+            return result_1805284658;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(string? requestUri, System.Threading.CancellationToken cancellationToken)
+        {
+            string? requestUri_ = requestUri;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result_1805284658 = _Instance.GetAsync(requestUri_, cancellationToken_);
+            return result_1805284658;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(System.Uri? requestUri, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Uri? requestUri_ = requestUri;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result_1805284658 = _Instance.GetAsync(requestUri_, cancellationToken_);
+            return result_1805284658;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(string? requestUri, System.Net.Http.HttpCompletionOption completionOption, System.Threading.CancellationToken cancellationToken)
+        {
+            string? requestUri_ = requestUri;
+            System.Net.Http.HttpCompletionOption completionOption_ = completionOption;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result_1805284658 = _Instance.GetAsync(requestUri_, completionOption_, cancellationToken_);
+            return result_1805284658;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> GetAsync(System.Uri? requestUri, System.Net.Http.HttpCompletionOption completionOption, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Uri? requestUri_ = requestUri;
+            System.Net.Http.HttpCompletionOption completionOption_ = completionOption;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result_1805284658 = _Instance.GetAsync(requestUri_, completionOption_, cancellationToken_);
+            return result_1805284658;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PostAsync(string? requestUri, System.Net.Http.HttpContent? content)
+        {
+            string? requestUri_ = requestUri;
+            System.Net.Http.HttpContent? content_ = content;
+            var result__1705712948 = _Instance.PostAsync(requestUri_, content_);
+            return result__1705712948;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PostAsync(System.Uri? requestUri, System.Net.Http.HttpContent? content)
+        {
+            System.Uri? requestUri_ = requestUri;
+            System.Net.Http.HttpContent? content_ = content;
+            var result__1705712948 = _Instance.PostAsync(requestUri_, content_);
+            return result__1705712948;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PostAsync(string? requestUri, System.Net.Http.HttpContent? content, System.Threading.CancellationToken cancellationToken)
+        {
+            string? requestUri_ = requestUri;
+            System.Net.Http.HttpContent? content_ = content;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result__1705712948 = _Instance.PostAsync(requestUri_, content_, cancellationToken_);
+            return result__1705712948;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PostAsync(System.Uri? requestUri, System.Net.Http.HttpContent? content, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Uri? requestUri_ = requestUri;
+            System.Net.Http.HttpContent? content_ = content;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result__1705712948 = _Instance.PostAsync(requestUri_, content_, cancellationToken_);
+            return result__1705712948;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PutAsync(string? requestUri, System.Net.Http.HttpContent? content)
+        {
+            string? requestUri_ = requestUri;
+            System.Net.Http.HttpContent? content_ = content;
+            var result_182918739 = _Instance.PutAsync(requestUri_, content_);
+            return result_182918739;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PutAsync(System.Uri? requestUri, System.Net.Http.HttpContent? content)
+        {
+            System.Uri? requestUri_ = requestUri;
+            System.Net.Http.HttpContent? content_ = content;
+            var result_182918739 = _Instance.PutAsync(requestUri_, content_);
+            return result_182918739;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PutAsync(string? requestUri, System.Net.Http.HttpContent? content, System.Threading.CancellationToken cancellationToken)
+        {
+            string? requestUri_ = requestUri;
+            System.Net.Http.HttpContent? content_ = content;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result_182918739 = _Instance.PutAsync(requestUri_, content_, cancellationToken_);
+            return result_182918739;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PutAsync(System.Uri? requestUri, System.Net.Http.HttpContent? content, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Uri? requestUri_ = requestUri;
+            System.Net.Http.HttpContent? content_ = content;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result_182918739 = _Instance.PutAsync(requestUri_, content_, cancellationToken_);
+            return result_182918739;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PatchAsync(string? requestUri, System.Net.Http.HttpContent? content)
+        {
+            string? requestUri_ = requestUri;
+            System.Net.Http.HttpContent? content_ = content;
+            var result_910894592 = _Instance.PatchAsync(requestUri_, content_);
+            return result_910894592;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PatchAsync(System.Uri? requestUri, System.Net.Http.HttpContent? content)
+        {
+            System.Uri? requestUri_ = requestUri;
+            System.Net.Http.HttpContent? content_ = content;
+            var result_910894592 = _Instance.PatchAsync(requestUri_, content_);
+            return result_910894592;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PatchAsync(string? requestUri, System.Net.Http.HttpContent? content, System.Threading.CancellationToken cancellationToken)
+        {
+            string? requestUri_ = requestUri;
+            System.Net.Http.HttpContent? content_ = content;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result_910894592 = _Instance.PatchAsync(requestUri_, content_, cancellationToken_);
+            return result_910894592;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> PatchAsync(System.Uri? requestUri, System.Net.Http.HttpContent? content, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Uri? requestUri_ = requestUri;
+            System.Net.Http.HttpContent? content_ = content;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result_910894592 = _Instance.PatchAsync(requestUri_, content_, cancellationToken_);
+            return result_910894592;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> DeleteAsync(string? requestUri)
+        {
+            string? requestUri_ = requestUri;
+            var result_534537427 = _Instance.DeleteAsync(requestUri_);
+            return result_534537427;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> DeleteAsync(System.Uri? requestUri)
+        {
+            System.Uri? requestUri_ = requestUri;
+            var result_534537427 = _Instance.DeleteAsync(requestUri_);
+            return result_534537427;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> DeleteAsync(string? requestUri, System.Threading.CancellationToken cancellationToken)
+        {
+            string? requestUri_ = requestUri;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result_534537427 = _Instance.DeleteAsync(requestUri_, cancellationToken_);
+            return result_534537427;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> DeleteAsync(System.Uri? requestUri, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Uri? requestUri_ = requestUri;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result_534537427 = _Instance.DeleteAsync(requestUri_, cancellationToken_);
+            return result_534537427;
+        }
+
+        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        public System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request)
+        {
+            System.Net.Http.HttpRequestMessage request_ = request;
+            var result__989347188 = _Instance.Send(request_);
+            return result__989347188;
+        }
+
+        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        public System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request, System.Net.Http.HttpCompletionOption completionOption)
+        {
+            System.Net.Http.HttpRequestMessage request_ = request;
+            System.Net.Http.HttpCompletionOption completionOption_ = completionOption;
+            var result__989347188 = _Instance.Send(request_, completionOption_);
+            return result__989347188;
+        }
+
+        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        public override System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Net.Http.HttpRequestMessage request_ = request;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result__989347188 = _Instance.Send(request_, cancellationToken_);
+            return result__989347188;
+        }
+
+        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        public System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request, System.Net.Http.HttpCompletionOption completionOption, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Net.Http.HttpRequestMessage request_ = request;
+            System.Net.Http.HttpCompletionOption completionOption_ = completionOption;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result__989347188 = _Instance.Send(request_, completionOption_, cancellationToken_);
+            return result__989347188;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> SendAsync(System.Net.Http.HttpRequestMessage request)
+        {
+            System.Net.Http.HttpRequestMessage request_ = request;
+            var result__1161702976 = _Instance.SendAsync(request_);
+            return result__1161702976;
+        }
+
+        public override System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Net.Http.HttpRequestMessage request_ = request;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result__1161702976 = _Instance.SendAsync(request_, cancellationToken_);
+            return result__1161702976;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> SendAsync(System.Net.Http.HttpRequestMessage request, System.Net.Http.HttpCompletionOption completionOption)
+        {
+            System.Net.Http.HttpRequestMessage request_ = request;
+            System.Net.Http.HttpCompletionOption completionOption_ = completionOption;
+            var result__1161702976 = _Instance.SendAsync(request_, completionOption_);
+            return result__1161702976;
+        }
+
+        public System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> SendAsync(System.Net.Http.HttpRequestMessage request, System.Net.Http.HttpCompletionOption completionOption, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Net.Http.HttpRequestMessage request_ = request;
+            System.Net.Http.HttpCompletionOption completionOption_ = completionOption;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result__1161702976 = _Instance.SendAsync(request_, completionOption_, cancellationToken_);
+            return result__1161702976;
+        }
+
+        public void CancelPendingRequests()
+        {
+            _Instance.CancelPendingRequests();
+        }
+
+
+
+
+
+
+
+        public HttpClientProxy(System.Net.Http.HttpClient instance) : base(instance)
+        {
+            _Instance = instance;
+            _InstanceHttpMessageInvoker = instance;
+
+
+        }
+    }
+}
+#nullable restore

tests/ProxyInterfaceSourceGeneratorTests/Destination/System.Net.Http.HttpMessageInvokerProxy.g.cs

@@ -0,0 +1,59 @@
+//----------------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by https://github.com/StefH/ProxyInterfaceSourceGenerator.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//----------------------------------------------------------------------------------------
+
+#nullable enable
+using System;
+
+namespace ProxyInterfaceSourceGeneratorTests.Source
+{
+    public partial class HttpMessageInvokerProxy : IHttpMessageInvoker
+    {
+        public System.Net.Http.HttpMessageInvoker _Instance { get; }
+        
+
+
+
+        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+        public virtual System.Net.Http.HttpResponseMessage Send(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Net.Http.HttpRequestMessage request_ = request;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result__989347188 = _Instance.Send(request_, cancellationToken_);
+            return result__989347188;
+        }
+
+        public virtual System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage> SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
+        {
+            System.Net.Http.HttpRequestMessage request_ = request;
+            System.Threading.CancellationToken cancellationToken_ = cancellationToken;
+            var result__1161702976 = _Instance.SendAsync(request_, cancellationToken_);
+            return result__1161702976;
+        }
+
+        public void Dispose()
+        {
+            _Instance.Dispose();
+        }
+
+
+
+
+
+
+
+        public HttpMessageInvokerProxy(System.Net.Http.HttpMessageInvoker instance)
+        {
+            _Instance = instance;
+            
+
+
+        }
+    }
+}
+#nullable restore

tests/ProxyInterfaceSourceGeneratorTests/ProxyInterfaceSourceGeneratorTest.cs

@@ -448,4 +448,86 @@ public class ProxyInterfaceSourceGeneratorTest
 
         c.Should().Be(101);
     }
+
+    [Fact]
+    public void GenerateFiles_HttpClient()
+    {
+        // Arrange
+        var attributeFilename = "ProxyInterfaceGenerator.Extra.g.cs";
+        var interfaceIHttpClientFilename = "ProxyInterfaceSourceGeneratorTests.Source.IHttpClient.g.cs";
+        var proxyClassIHttpClientFilename = "System.Net.Http.HttpClientProxy.g.cs";
+        var interfaceIHttpMessageInvokerFilename = "ProxyInterfaceSourceGeneratorTests.Source.IHttpMessageInvoker.g.cs";
+        var proxyClassIHttpMessageInvokerFilename = "System.Net.Http.HttpMessageInvokerProxy.g.cs";
+
+        var pathIHttpClient = "./Source/IHttpClient.cs";
+        var sourceFileIHttpClient = new SourceFile
+        {
+            Path = pathIHttpClient,
+            Text = File.ReadAllText(pathIHttpClient),
+            AttributeToAddToInterface = new ExtraAttribute
+            {
+                Name = "ProxyInterfaceGenerator.Proxy",
+                ArgumentList = "typeof(System.Net.Http.HttpClient)"
+            }
+        };
+
+        var pathIHttpMessageInvoker = "./Source/IHttpMessageInvoker.cs";
+        var sourceFileIHttpMessageInvoker = new SourceFile
+        {
+            Path = pathIHttpMessageInvoker,
+            Text = File.ReadAllText(pathIHttpMessageInvoker),
+            AttributeToAddToInterface = new ExtraAttribute
+            {
+                Name = "ProxyInterfaceGenerator.Proxy",
+                ArgumentList = "typeof(System.Net.Http.HttpMessageInvoker)"
+            }
+        };
+
+        // Act
+        var result = _sut.Execute(new[] { sourceFileIHttpClient, sourceFileIHttpMessageInvoker });
+
+        // Assert
+        result.Valid.Should().BeTrue();
+        result.Files.Should().HaveCount(5);
+
+        // Assert attribute
+        var attribute = result.Files[0].SyntaxTree;
+        attribute.FilePath.Should().EndWith(attributeFilename);
+
+
+        // Assert interface IHttpClient
+        var interfaceIHttpClient = result.Files[1].SyntaxTree;
+        interfaceIHttpClient.FilePath.Should().EndWith(interfaceIHttpClientFilename);
+
+        var interfaceCodeIHttpClient = interfaceIHttpClient.ToString();
+        if (Write) File.WriteAllText($"../../../Destination/{interfaceIHttpClientFilename}", interfaceCodeIHttpClient);
+        interfaceCodeIHttpClient.Should().NotBeNullOrEmpty().And.Be(File.ReadAllText($"../../../Destination/{interfaceIHttpClientFilename}"));
+
+
+        // Assert interface IHttpMessageInvoker
+        var interfaceIMessageInvoker = result.Files[2].SyntaxTree;
+        interfaceIMessageInvoker.FilePath.Should().EndWith(interfaceIHttpMessageInvokerFilename);
+
+        var interfaceCodeIMessageInvoker = interfaceIMessageInvoker.ToString();
+        if (Write) File.WriteAllText($"../../../Destination/{interfaceIHttpMessageInvokerFilename}", interfaceCodeIMessageInvoker);
+        interfaceCodeIMessageInvoker.Should().NotBeNullOrEmpty().And.Be(File.ReadAllText($"../../../Destination/{interfaceIHttpMessageInvokerFilename}"));
+
+
+        // Assert Proxy IHttpClient
+        var proxyClassIHttpClient = result.Files[3].SyntaxTree;
+        proxyClassIHttpClient.FilePath.Should().EndWith(proxyClassIHttpClientFilename);
+
+        var proxyCodeIHttpClient = proxyClassIHttpClient.ToString();
+        if (Write) File.WriteAllText($"../../../Destination/{proxyClassIHttpClientFilename}", proxyCodeIHttpClient);
+        proxyCodeIHttpClient.Should().NotBeNullOrEmpty().And.Be(File.ReadAllText($"../../../Destination/{proxyClassIHttpClientFilename}"));
+
+
+        // Assert Proxy IHttpMessageInvoker
+        var proxyClassIMessageInvoker = result.Files[4].SyntaxTree;
+        proxyClassIMessageInvoker.FilePath.Should().EndWith(proxyClassIHttpMessageInvokerFilename);
+
+        var proxyIMessageInvoker = proxyClassIMessageInvoker.ToString();
+        if (Write) File.WriteAllText($"../../../Destination/{proxyClassIHttpMessageInvokerFilename}", proxyIMessageInvoker);
+        proxyIMessageInvoker.Should().NotBeNullOrEmpty().And.Be(File.ReadAllText($"../../../Destination/{proxyClassIHttpMessageInvokerFilename}"));
+    }
 }

tests/ProxyInterfaceSourceGeneratorTests/Source/Human.cs

@@ -5,5 +5,10 @@ namespace ProxyInterfaceSourceGeneratorTests.Source
         public bool IsAlive { get; set; }
 
         public string GetterOnly => "x";
+
+        public void Dispose()
+        {
+
+        }
     }
 }

tests/ProxyInterfaceSourceGeneratorTests/Source/IHttpClient.cs

@@ -0,0 +1,5 @@
+namespace ProxyInterfaceSourceGeneratorTests.Source;
+
+public partial interface IHttpClient : IHttpMessageInvoker
+{
+}

tests/ProxyInterfaceSourceGeneratorTests/Source/IHttpMessageInvoker.cs

@@ -0,0 +1,5 @@
+namespace ProxyInterfaceSourceGeneratorTests.Source;
+
+public partial interface IHttpMessageInvoker
+{
+}