Hello Peter,
If you rebuild the project, does the error go away? Also, are you only seeing this design-time and are you able to compile and run the project?
Could you also make sure the registered in the Visual Studio toolbox version of the assemblies targets .NET 4.5 and let me know whether they are the standard or XAML-less assemblies? You can take a look at this article for a reference on how to launch the configurator.
We're aware of a couple of design-time issues when using the Telerik UI for WPF controls in Visual Studio 2015, but this one is not among them and we're unable to replicate it, so any additional details you can share will be appreciated.
Regards,
Petya
Telerik
If you rebuild the project, does the error go away? Also, are you only seeing this design-time and are you able to compile and run the project?
Could you also make sure the registered in the Visual Studio toolbox version of the assemblies targets .NET 4.5 and let me know whether they are the standard or XAML-less assemblies? You can take a look at this article for a reference on how to launch the configurator.
We're aware of a couple of design-time issues when using the Telerik UI for WPF controls in Visual Studio 2015, but this one is not among them and we're unable to replicate it, so any additional details you can share will be appreciated.
Regards,
Petya
Telerik
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 Feedback Portal and vote to affect the priority of the items