App.xaml designer not working in C#, how to fix it?

Question

C++ / C#

Good afternoon! Started a new project for Universal Apps but says: "App.xaml cannot be edited in the Design view." How can this be fixed?

Answer 1

You cannot edit the App.xaml file in the visual editor because it is simply not designed to host controls, create other Views (Window, UserControl, Page) instead.
In App.xaml, you can declaratively place links to the necessary resources, styles, and so on.