Background color of VS Package Addin?

this may be a pretty simple question.

I've created a VS Package and it has a nice little GUI. The background of the GUI should be System.Colors.ControlBrush:

<Grid Background="{x:Static SystemColors.ControlBrush}">

Now I have the problem, that it changes the color of the Grid, but not of the rest of the window. -> Screenshot

I thought I could change the background of the UserControl the 开发者_StackOverflow社区same way, but somehow it doesn't work. Now it doesn't really look that great, if a part of the window is grey and the rest is white.

Any idea?

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Your UserControl is probably not covering the entire window.

Remove any Width or Height attributes and make sure that the Horizontal/Vertical Alignments are both Stretch.