From b2a758a77e9002d756292e12581af9a04a14f9ac Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Sun, 25 Oct 2020 14:43:47 +0000
Subject: [PATCH] fix resolvebyname extension so it can never return null.

---
 .../MarkupExtensions/ResolveByNameExtension.cs                  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/ResolveByNameExtension.cs b/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/ResolveByNameExtension.cs
index 8561aa898b..909462392c 100644
--- a/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/ResolveByNameExtension.cs
+++ b/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/ResolveByNameExtension.cs
@@ -30,7 +30,7 @@ namespace Avalonia.Markup.Xaml.MarkupExtensions
             if (provideValueTarget.TargetProperty is IPropertyInfo property) 
                 value.OnCompleted(() => property.Set(target, value.GetResult()));
 
-            return null;
+            return AvaloniaProperty.UnsetValue;
         }
     }
 }