Hello Walther Siksma,
Could you please elaborate a little bit more on the issue you are faced with?
What result did you get when trying to use LINQ as datasource? Were there any errors?
It would be great if you can send us a sample project reproducing the behavior you observed. Having a sample project will help us to investigate the issue.
In order to attach your file you will need to open a support ticket.
Thank you in advance for your cooperation.
the Telerik team