AlternateContent Tags causing issues with IDE, but not compiler

Question

I am working on a legacy product. I need to make regions of a complex UI optional, based on build constants. It is not feasible to move these regions into controls, so I a

Answer 1

What about this:

public class BuildConstants
{
    public bool IsDebug
    {
        get
        {
#if DEBUG
            return true;
#else
            return false;
#endif
        }
    }
}

and the xaml: