I am trying to add a NumericUpDown to my WPF window at design time in Visual Studio 2013. So far I simply have:
<NumericUpDown/>
Which gives me the Error: NumericUpDown is not supported in a Window Presentatio Foundation (WPF) project.
I think I'm misunderstanding something about namespaces in XAML, I've tried to add the full namespace but that still gets the same error. All the help I see online is older and is about building your own.