You have Width
and Height
set to Auto
, so I guess you want to allow the control to take as much space as needed but not more.
Also, UserControl
is not resizing by itself, but depends upon the layout that it's part of.
So, the quickest way to fix your issue would be to set HorizontalAlignment="Left"
and VerticalAlignment="Top"
. But you should consider the whole layout of your application and how the UC is affected by-/affects on other components of the UI.