Speckle.Material.Avalonia/Material.Dialog/ViewModels/ViewModelBase.cs

using System.ComponentModel;
using System.Runtime.CompilerServices; 

namespace Material.Dialog
{
    public class ViewModelBase : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
            => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}