Telerik UI for WPF Visual Studio Extension crash on upgrade wizard

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Damien asked on 18 Aug 2022, 05:57 PM

Trying to upgrade my C# WPF application to the latest telerik version using the Upgrade Wizard,

It crash right after starting the upgrade with:


An error occurred while running the wizard.

Error executing custom action Telerik.Windows.WPF.VSX.Actions.MultiProjectUpdateReferencesAction: System.Runtime.InteropServices.COMException (0x80004005): This reference cannot be removed from the project because it is always referenced by the compiler.
   at VSLangProj.Reference.Remove()
   at Telerik.VSX.ProjectConfigurators.ApplicationReferenceManager.RemoveReferences()
   at Telerik.VSX.ProjectConfigurators.ApplicationReferenceManager.UpdateReferences()
   at Telerik.VSX.Actions.UpdateReferencesAction.UpdateReferences(IProjectWrapUIComponents projectWrap)
   at Telerik.VSX.Actions.MultiProjectActionBase`1.Execute(WizardContext wizardContext, IPropertyDataDictionary arguments)
   at Telerik.VSX.Actions.MultiProjectUpdateReferencesActionBase`1.Execute(WizardContext wizardContext, IPropertyDataDictionary arguments)
   at Telerik.VSX.WizardEngine.ActionManager.ExecActions()


Tried in VS2019 and VS2022, same results. Installed the latest Telerik extension from the VS Extension market.

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Nikolay Mishev
Telerik team
answered on 19 Aug 2022, 10:46 AM

Hi Damien,

This message usually appears when the Upgrade Wizard is used to update references that are added through a NuGet package. Usually, the wizard removes the old references and then replaces them with the newer version ones. If the references are added through a NuGet package the wizard cannot remove the old reference and throws this exception. 

In this case, I would suggest opening the solution and then using the NuGet Package Manager available through Tools > NuGet Package Manager > Manage NuGet Packages for Solution... to update the packages' version which will also update the references.

Please let us know if this worked out for you.

Nikolay Mishev
Progress Telerik

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