As the title says. As a newbie to this, it was not immediately obvious what those 50 build errors meant. I had to compare it with the F# WPF template to figure out what is wrong. In addition to that the FSharpDesktopUINumericUpDown demo needs Fsharp.Desktop.UI as well. It might be good to have the necessary packages be automatically downloaded.
The FsXaml project in general needs some documentation for it.