An unhandled exception occurred in the silverlight application sharepoint 2010

              When i try to create a new list or document library in my site, I came across this weird problem.

              The original problem is Silverlight application in sharepoint does not get connected to the Windows Communication Foundation. This dosent allow us to create a list or library in a site. This is just a security issue at server side  and could be resolved by following this procedure.                    

1. Open Central Administration
2. Select Application Management
3. Select Manage Web Applications
4. Select the Web Application where the error occurs
5. In the ribbon, select General Settings
6. In the Web Application General Settings dialog box, find Web Page Security Validation and select On 

This resolves the problem and now a new list or library could be created.