Hello,

There appears to be an issue with the UltraExpandableGroupBoxPanel, specifically in regard to the auto-generated designer code-behind.

In the attached project, I added an UltraExpandableGroupBox to Form1 using the Windows Forms designer. I then dropped a Label onto the UltraExpandableGroupBox. Upon examining the auto-generated designer code-behind, the Label was correctly added to the Controls collection of the UltraExpandableGroupBoxPanel. However, upon closing and re-opening the designer, the Label is no longer shown. The only way to get it to show up is to manually change the designer code-behind by adding "UltraExpandableGroupBoxPanel1.Dock = DockStyle.Fill". Unfortunately, making any other changes in the designer will cause that code to be deleted when the code is re-generated.

Any assistance would be appreciated.

UltraExpandableGroupBoxPanelBug.zip