Use null propagation

src/Avalonia.ReactiveUI/AutoDataTemplateBindingHook.cs

@@ -38,10 +38,7 @@ namespace Avalonia.ReactiveUI
         {
             var viewProperties = getCurrentViewProperties();
             var lastViewProperty = viewProperties.LastOrDefault();
-            if (lastViewProperty == null)
+            var itemsControl = lastViewProperty?.Sender as ItemsControl;
-                return true;
-            
-            var itemsControl = lastViewProperty.Sender as ItemsControl;
             if (itemsControl == null)
                 return true;