Binding on RotateTransform Angle in DataTemplate not taking effect

Question

In my WPF UserControl I have this resource, please observe the comments in the Xml sample.

Answer 1

I recreated similar setting as you and it did not work for me either. Curiously there are no binding errors. I did relativesource binding too and it didnt work.

Although if I bind tooltip

shows the tooltip to me. So I changed the rotate transform,

But still the transform did not work. Still no binding errors.

Then I introduced a dummy converter ...

public class AngleConverter : IValueConverter
{
    public object Convert(...)
    {
        return value;
    }
    ....
}

and it worked miraculously!!!

Unexplanable world of WPF???