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Designer is Not Loading


Product Version Product Author
2022.2.622 UI for WinForms Desislava Yordanova


After upgrading from version 2022.2.622 to any newer version, the form's designer may not be opened even though the correct assemblies are referred in the project and the license file is deleted.

designer-not-loading 001

If you have a RadRibbonBar on the form, this is a potential reason for the broken design time experience.


There was an issue related to RadRibbonBar which used to serialize the CreateAdapterMethod property in the resource file:

designer-not-loading 002

After decoding the serialized base64 content, here comes the assembly version displayed in the failed designer:

designer-not-loading 003

The issue has already been addressed and a fix was released in R3 2022. The CreateAdapterMethod property is not serialized any more. However, all broken resource files need to be manually handled and delete the serialized CreateAdapterMethod property from the .resx.

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