The most probable reason for the No such property registered exception is that you are using different versions of our dlls. Please try the following steps:
Delete all Telerik references from your project.
Add them anew. Make sure that you are adding references to our latest assemblies.
Restart Visual Studio (Visual Studio keeps references in the memory during design time)
Clean and rebuild your application.
Please try this and write me back if the issue persists.
Regards,
Nick
the Telerik team
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