Missing 1 DesignTimeProperty

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.XamlDom/Project/XamlParser.cs

@@ -585,6 +585,8 @@ namespace ICSharpCode.WpfDesign.XamlDom
 				return FindAttachedProperty(typeof(DesignTimeProperties), attribute.LocalName);
 			} else if (attribute.LocalName == "LayoutRounding" && attribute.NamespaceURI == XamlConstants.DesignTimeNamespace) {
 				return FindAttachedProperty(typeof(DesignTimeProperties), attribute.LocalName);
+			} else if (attribute.LocalName == "DataContext" && attribute.NamespaceURI == XamlConstants.DesignTimeNamespace) {
+				return FindAttachedProperty(typeof(DesignTimeProperties), attribute.LocalName);
 			}