Missing control in WPF project?

Question

WPF

There is no SplitView in my project, that is, I write in XAML: And it says to me that there is no link to the assembly. I didn't find anything on the internet about this topic.
<SplitView></SplitView>

Answer 1

The Internet is full on this topic. For example https://stackoverflow.com/questions/33104030/is-th...