You could find modified project in the attached file.
1. Click "Button1", "Button2", "Button3".
2. Click "Button4" - it'll hide some of the columns.
3. Click "Button1", "Button2" - (columns remain hidden)
Question. I was looking for solution to restore the columns.
While testing/waiting/investigating I have installed 8.2 version to check the example. It looks like in my test application it works as desired/expected.
Please confirm that issue exists in v 7.4 for .NET 2.0.
Thank you.
columncreation2_92501bc5.zip