When right click on the gridview and select the 'open Property Builder', error occurred as "Object Reference not set to an instance of an object".
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Dess | Tech Support Engineer, Principal
Telerik team
answered on 07 Jul 2017, 09:29 AM
Hello Muhammad,
Thank you for writing.
The provided information is not enough for me to replicate the issue locally. I would like to ask you to carefully 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). Better yet, you can remove all references and add them anew by using the DLLs from your installation. 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.
I hope this information helps. Should you have further questions I would be glad to help.