Answer 1

Absolutely. WPF is pretty great at component (or to use Microsoft’s word, “control”) composition; the only downside is that because XAML is pretty verbose and depends on companion C# files for state management, it can be a bit fiddlier than the rapid development of Angular components you might be used to.

There’s a pretty thorough guide on MSDN. I suggest you read it to get a feel for how involved the process is.
Details:
https://blogs.msdn.microsoft.com/windowsappdev/2012/10/15/building-a-custom-control-using-xaml-and-c/