When adding the UserControl to the GroupBarItem’s Client area, the UserControl is added as a child control of the GroupBar and sizing issue may occur in UserControl. This behavior with GroupBar occurs due to the AutoScaleMode property. When you set the AutoScaleMode property to “Font”, the font of UserControl uses the font of the parent.
The following settings can be used to avoid this issue:
The following code example is to demonstrate the same.
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