System.NullReferenceException occurs in xaml designer

Question

I've created a C++ UWP Windows 10 app using Visual Studio 2015. However, I'm not able to visualize any xaml in the designer because I'm always getting a System.NullReferenceException error. How can I fix this?

Answer 1

That's very odd but I solved following these steps:

1. Close any instance of Visual Studio
2. Open Visual studio and create a new C# UWP empty project (name it as you like, do not matter)
3. Run the "useless" created project then close it as Visual Studio
4. Open again your previous C++ UWP project

In my case everything started working!

Answer 2

Switching solution platform to x86 worked for me.