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Editorial Team
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Asked: 2026-05-21T03:57:57+00:00

This is a follow-up to All controls on a form are invisible , now

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This is a follow-up to All controls on a form are invisible, now that I know a little more about it.

I have a certain form that was created with the Windows Forms designer of Visual Studio 2010. It was working fine until some time this week. Now when I make any change to the form and the designer recreates the .designer.cs file, all binding members are set to “none”, and all Controls.Add calls are removed. The controls still are visible in the designer, but then when I run the project the controls are all invisible (due to there being no Controls.Add calls). If I close and reopen the designer, the form is blank.

There are no errors, warnings or messages indicating why the designer is being a jerk, and I really don’t want to have to recreate every single control on that form, but it’s looking like I might have no choice.

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1 Answer

  1. Editorial Team

    It turns out that the real root cause is compiling in .NET 3.5 mode even though the designer is biased toward .NET 4.0. It works fine when compiling against .NET 4.0, but as soon as the .resx changes to have references to “2.0.0.0” drawing components instead of “4.0.0.0”, the designer freaks out.

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