Visual Studio design view contains yellow warning icons?

Question

I have created a WPF project in Visual Studio which contains a MainWindow. This "imports" other user controls via XAML. The MainWindow is shown with warning icons and the following text. Unfortunately I don't have the English translation but it means something like this:

This document contains one or more controls which have been changed. Rebuild the project to show the changes in the design view.

Rebuilding the complete solution does not help. However these warnings do not have any effect.

How can I get rid of these warnings?

Answer 1

I have tried Asryaels solution which is as follows:

1. Cleaning
2. Rebuilding
3. Saving all documents
4. Closing Visual Studio
5. Starting Visual Studio
6. Cleaning
7. Rebuilding