Force a resource language in UWP

If your app published in only one language such as zh-cn, but the generated package contain two languages such as en-us, zh-cn, you should to force language in Package.appxmanifest.
Locate the codes here:

Changes to eg: zh-cn:

How to solve focus issue in UWP

1. Check all focus codes in your solution.
2. Make sure Control.IsTabStop = True, especially for the Page class because it is not default to true.
3. Remove .vs folder under your solution.(Need close Visual Studio)