Fixed ResolveByNameExtension

src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/ResolveByNameExtension.cs

@@ -1,5 +1,6 @@
 using System;
 using Avalonia.Controls;
+using Avalonia.Data.Core;
 
 namespace Avalonia.Markup.Xaml.MarkupExtensions
 {
@@ -15,26 +16,20 @@ namespace Avalonia.Markup.Xaml.MarkupExtensions
         public object ProvideValue(IServiceProvider serviceProvider)
         {
             var namescope = serviceProvider.GetService<INameScope>();
-            var provideValueTarget = serviceProvider.GetService<IProvideValueTarget>();
-
+            
             var value = namescope.FindAsync(Name);
 
             if(value.IsCompleted)
-            {
                 return value.GetResult();
-            }
-            else
-            {
-                value.OnCompleted(() =>
-                {
-                    if(provideValueTarget is AvaloniaObject ao)
-                    {
-                        ao.SetValue(provideValueTarget.TargetProperty as AvaloniaProperty, value);
-                    }
-                });
 
-                return null;
-            }
+            var provideValueTarget = serviceProvider.GetService<IProvideValueTarget>();
+            var target = provideValueTarget.TargetObject;
+            var property = provideValueTarget.TargetProperty as IPropertyInfo;
+
+            if (property != null) 
+                value.OnCompleted(() => property.Set(target, value.GetResult()));
+
+            return null;
         }
     }
 }