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Question

Hello, I have a winform app with .net framework 3.5. When I try to open a form page having this error

I can continue development if i click 'Ignore and Continue' but sometimes visual studio is closing. How can i solve this problem.

Answer 1

Hello @Oktay Arslan,

Welcome to Microsoft Q&A forum.

Please try following methods and let us know if the error disappears.

1. Update VS 2022 to the latest version.
2. Search Turn Windows features on or off in Windows Search box, open it, select(turn on) .NET Framework 3.5. Make sure that .NET Framework 3.5 has been installed/turned on. Open VS Installer, Modify, switch to Individual components, make sure that .NET Framework 3.5 development tools component has been selected and installed.
3. To narrow down this issue, please try to create a new WinForm project which targets .NET Framework 3.5 and check if the same error will appear. If this issue only appears on a specific project, can you confirm if there are any special settings in this project?

Best Regards,

Tianyu

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