# C# user controls vanish in designer!?

**URL:** <https://forum.kirupa.com/t/c-user-controls-vanish-in-designer/246542>\
**Category:** programming\
**Created:** [December 12, 2007, 4:25am UTC](https://forum.kirupa.com/t/c-user-controls-vanish-in-designer/246542 "2007-12-12T04:25:02Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![flashbabe](https://avatars.discourse-cdn.com/v4/letter/f/65b543/32.png) [@flashbabe](https://forum.kirupa.com/u/flashbabe)\
**Post date:** [December 12, 2007, 4:25am UTC](https://forum.kirupa.com/t/c-user-controls-vanish-in-designer/246542/1 "2007-12-12T04:25:02Z")

</div>

Has anyone else run into this issue?

I’m using tab control and have controls on a tab. They all of the sudden vanish from my designer mode. When I run the project they are still on the form, also closing the project and reopening they will be there … but only for a bit and they vanish again?

Any idea what causes this? Any idea how I can make a lasting fix?