Fix issue #4 (string?) (#15)

* #4

* Only replace if required

* fix

* private readonly IMapper _mapper;

* CRLF

src-examples/ProxyInterfaceConsumer/Program.cs

@@ -45,9 +45,9 @@ namespace ProxyInterfaceConsumer
             //p.Void();
             Console.WriteLine(JsonSerializer.Serialize(p, JsonSerializerOptions));
 
-            GeneratorExecutionContext g = new GeneratorExecutionContext();
-            IGeneratorExecutionContext gc = new GeneratorExecutionContextProxy(g);
-            int y = 9;
+            //GeneratorExecutionContext g = new GeneratorExecutionContext();
+            //IGeneratorExecutionContext gc = new GeneratorExecutionContextProxy(g);
+            //int y = 9;
         }
     }