Issues building Winforms app with Telerik.WinControls.Themes.Crystal library

[Zubin]

Hi:

I have a Winforms application that I recently update the Telerik controls to 2023.1.117.40.

I am now unable to build as I am getting the following error:

'Could not load file or assembly 'Telerik.WinControls.Themes.Crystal, Version=2023.1.117.40, Culture=neutral, PublicKeyToken=bf4391287131aaeb' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)'

Am I missing a required Telerik library in my references?

Here are the libraries I am currently referencing:

 

[Zubin]

We are using Visual Studio 2019 and .Net 4.5.

 

I did run DependencyWalker against the Themes.Crystal library, and it did not turn up anything that we are mssing.

[Dess | Tech Support Engineer, Principal]

Hello, Zubin,

According to the provided information, it wouldn't be easy to determine what causes the undesired behavior you are facing.

I would like to ask you to check the references to all Telerik controls in your project and make sure that they are the same version considering the suffix as well (.20 or .40) since it is usually the most common reason for such a behavior after upgrading. Better yet, you can remove all references and add them anew by using the DLLs from your fresh installation: https://docs.telerik.com/devtools/winforms/installation-and-upgrades/updating-assemblies-in-a-project
Delete the license.licx file. After that, you should rebuild your project, close Visual Studio and open it again to make sure that no references are kept in the memory by Visual Studio. Ensure that no old versions are available in GAC: https://docs.telerik.com/devtools/winforms/knowledge-base/examine-the-gac
Off topic, the following KB article demonstrates the different approaches that you may follow when upgrading the Telerik UI for WinForms suite:
https://docs.telerik.com/devtools/winforms/knowledge-base/how-to-upgrade-a-project

I hope this information helps. If you need any further assistance please don't hesitate to contact me. 

Regards,
Dess | Tech Support Engineer, Principal
Progress Telerik