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Visual Studio WinForm Designer not working after .Net Framework migration to .Net Core


Hello StackOverFlow residents,

We migrated our giant enterprise project from .Net Framework -> .Net Core 6. The Xaml WCF Designer works just fine, while the WinForm and old Report designers are not working.

What steps should I follow? Thanks.

Winform Designer Xaml Designer Old Reports Designer New Reports Designer

A few steps I tried:

I created an external project independent of my project and tested whether the designer works in the same sdk version. The designer worked on the new project. I added a new form in the project where the designer is not working and tested whether the designer works. Failed.

I think this is due to a setting or something in the visual studio solution since I switched from .Net Framework -> .Net Core.


Solution

  • Not all programs can be switched through a simple .Net Framework->.Net Core.

    For project upgrades, there is a complete migration tutorial. Here's the relevant material: Example of migrating to the latest .NET

    Your non-working program may be due to an unsupported environment, try following the tutorial to migrate your program.