I've created a new web project using 'Telerik Web Site', added an existing web page (.aspx) which had a RadGrid added to it.
When I open up this page in Design, I get the following error. The Bin folder was created by the project and does have all DLLs including Telerik.Web.UI/Design
Error Creating Control - RadGrid
Unknown server tag:RadGrid
Error: Could not load file or assembly 'RadGrid.Net2' or one of its dependencies.