Can you try reinstalling the demos
? Please make sure that when you reinstall them you clear any remaining files especially assemblies manually before installing them again? You can also check the Common Issues section in the Installing WPF Demos
You can find the files for the WPF demos in <drive>:\Users\<your_user>\AppData\Local\Apps\2.0 You should clear the contents before installing the demos again.
Please let me know if that helps and if you need further assistance.
Want to extend the target reach of your WPF applications, leveraging iOS, Android, and UWP? Try UI for Xamarin
, a suite of polished and feature-rich components for the Xamarin framework, which allow you to write beautiful native mobile apps using a single shared C# codebase.