I am new to the iOS designer, which I think is a great tool, but am confused by one aspect of it. I am able to create a custom control, and it appears in the Toolbox panel as expected. However, in a few instances I have since deleted the custom control from my project in the solution explorer, but the custom control still appears in the iOS designer toolbox. How is this possible, and how can I remove it from the Toolbox once they have been deleted from the project? I have tried this in both the stable and beta releases, and get the same outcome in both.