E_FAIL COM exception after adding toggle switch to the about page template

[Mike]

I used the about page template and wanted to add the RadToggleSwitch to it

I get this in Blend and VS 2013
Exception: Error HRESULT E_FAIL has been returned from a call to a COM component.
   at MS.Internal.XcpImports.CheckHResult(UInt32 hr)
   at MS.Internal.XcpImports.Collection_InsertValue[T](PresentationFrameworkCollection`1 collection, UInt32 index, CValue value)
   at MS.Internal.XcpImports.Collection_InsertDependencyObject[T](PresentationFrameworkCollection`1 collection, UInt32 index, DependencyObject value)
   at System.Windows.PresentationFrameworkCollection`1.InsertDependencyObject(Int32 index, DependencyObject value)
   at System.Windows.Controls.UIElementCollection.InsertInternal(Int32 index, UIElement value)     

In a clean project single page with the about page added this does not happen?

[Deyan]

Hi Mike,

This happens often when Visual Studio uses cached versions of the assemblies referenced in your project.

Did you try cleaning your project, closing VS, re-opening it again and rebuilding the project?

Let us know if this doesn't help.

Regards,
Deyan
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