Loading of the visual designer was cancelled
When you open a XAML file in the Windows Presentation Foundation (WPF) Designer for Visual Studio, you can cancel the action by pressing the ESC key. When you cancel loading, the following message appears in the WPF Designer:
Load Cancelled
Loading of the visual designer was cancelled.
Resume loading the designer
You can click Resume loading the designer to continue loading the designer.
See Also
Concepts
Other Resources
Debugging and Interpreting Errors in the WPF Designer