Attempt to not deferr value types

src/Markup/Avalonia.Markup.Xaml.Loader/CompilerExtensions/Transformers/AvaloniaXamlIlDeferredResourceTransformer.cs

@@ -15,6 +15,9 @@ namespace Avalonia.Markup.Xaml.XamlIl.CompilerExtensions.Transformers
             if (!(node is XamlPropertyAssignmentNode pa) || pa.Values.Count != 2)
                 return node;
 
+            if (!ShouldBeDeferred(pa.Values[1]))
+                return node;
+
             var types = context.GetAvaloniaTypes();
 
             if (pa.Property.DeclaringType == types.ResourceDictionary && pa.Property.Name == "Content")
@@ -37,6 +40,13 @@ namespace Avalonia.Markup.Xaml.XamlIl.CompilerExtensions.Transformers
             return node;
         }
 
+        private static bool ShouldBeDeferred(IXamlAstValueNode node)
+        {
+            // XAML compiler is currently strict about value types, allowing them to be created only through converters.
+            // At the moment it should be safe to not defer structs.
+            return !node.Type.GetClrType().IsValueType;
+        }
+        
         class AdderSetter : IXamlPropertySetter, IXamlEmitablePropertySetter<IXamlILEmitter>
         {
             private readonly IXamlMethod _getter;

tests/Avalonia.Markup.Xaml.UnitTests/Xaml/ResourceDictionaryTests.cs

@@ -3,6 +3,7 @@ using Avalonia.Controls;
 using Avalonia.Controls.Presenters;
 using Avalonia.Controls.Templates;
 using Avalonia.Media;
+using Avalonia.Media.Immutable;
 using Avalonia.Styling;
 using Avalonia.UnitTests;
 using Xunit;
@@ -237,6 +238,23 @@ namespace Avalonia.Markup.Xaml.UnitTests.Xaml
                 Assert.False(buttonResources.ContainsDeferredKey("Red2"));
             }
         }
+        
+        [Fact]
+        public void Value_Type_With_Parse_Should_Not_Be_Deferred()
+        {
+            using (StyledWindow())
+            {
+                var xaml = @"
+<ResourceDictionary xmlns='https://github.com/avaloniaui'
+                    xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+    <Color x:Key='Red'>Red</Color>
+</ResourceDictionary>";
+                var resources = (ResourceDictionary)AvaloniaRuntimeXamlLoader.Load(xaml);
+
+                Assert.False(resources.ContainsDeferredKey("Red"));
+                Assert.IsType<Color>(resources["Red"]);
+            }
+        }
 
         private IDisposable StyledWindow(params (string, string)[] assets)
         {