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Asked: 2026-05-11T10:13:23+00:00

I have a WPF UserControl (Foo.xaml) that should be displayed streched (VerticalAlignment=Stretch HorizontalAlignment=Stretch) on

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I have a WPF UserControl (Foo.xaml) that should be displayed streched (VerticalAlignment=’Stretch’ HorizontalAlignment=’Stretch’) on a window.

  • If I don’t specify Width/Height on the UserControl it will be displayed as intended at runtime. Unfortunately the VS WPF designer will not show the control correctly if I open Foo.xaml (size may be 0x0 depending on the child controls).

  • If I specify a size on the UserControl the designer will work correctly with Foo.xaml but then it won’t strech at runtime.

How can I fix this so that it works at design and runtime?

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1 Answer

  1. It sounds like your UserControl is only useful if it is a certain minimum size. If so, set the MinWidth and MinHeight properties.

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