Hello @Cavit Dıraman,
Welcome to Microsoft Q&A forum.
Please try to click File > Close Solution > select and open this project again, see if the issue fixes.
Looks like the layout is not correctly loaded, is this issue reproducible on another newly created WinForm project?
If you are using any extension, please try to disable them temporarily, and check again.
Please also try to reset VS settings by closing VS, searching Developer Command Prompt for Visual Studio 2022
in Windows Search box, opening it and running devenv /ResetSettings
command.
Please feel free to let us know the results.
Best Regards,
Tianyu
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