Rotate Control at Center Point in XAML

This is my Grid

        <RotateTransform Angle="-180" />

However, it will be in the wrong position (I want it to rotate on the center point). Hence I need to do something like this:

    <RotateTransform CenterX="{Binding ???}" CenterY="{Binding ???}" Angle="-180" />

I'm not sure how to do the binding here (calculating the Grid's width/2 and height/2). Can someone give a hand? :)


Try set RenderTransformOrigin for Grid:

<Grid RenderTransformOrigin="0.5,0.5" ... />

Quote from MSDN:

RenderTransformOrigin: Gets or sets the center point of any possible render transform declared by RenderTransform, relative to the bounds of the element.

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