Merge pull request #614 from jogibear9988/master

Bugfix Exception when Deleting Objects ...

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Xaml/XamlDesignItem.cs

@@ -96,6 +96,7 @@ namespace ICSharpCode.WpfDesign.Designer.Xaml
 		/// <param name="newName"></param>
 		public void FixDesignItemReferencesOnNameChange(string oldName, string newName)
 		{
+			if (!string.IsNullOrEmpty(oldName) && !string.IsNullOrEmpty(newName)) {
 				var root = GetRootXamlObject(this.XamlObject);
 				var references = GetAllChildXamlObjects(root).Where(x => x.ElementType == typeof(Reference) && Equals(x.FindOrCreateProperty("Name").ValueOnInstance, oldName));
 				foreach (var designItem in references)
@@ -116,6 +117,7 @@ namespace ICSharpCode.WpfDesign.Designer.Xaml
 					property.PropertyValue = propertyValue;
 				}
 			}
+		}
 
 		/// <summary>
 		/// Find's the Root XamlObject (real Root, or Root Object in Namescope)