Which version are you using? I believe we resolved a similar issue recently. The exception is caused by the design time dlls not being loaded correctly or missing.
Kind regards,
Alex Fidanov
the Telerik team
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I use Telerik.Windows.Controls.Input, Runtime Version v2.0.50727, version 2011.1.322.1040 (RadControls for Silverlight Q1 2011)
I attached 2 images to show error, how to fix error?
0
Alex Fidanov
Telerik team
answered on 02 May 2011, 07:45 AM
Hi Kingsley,
This issue should be resolved with the latest internal build. Please re-test it with it.
All the best,
Alex Fidanov
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items