Visual Studio 2005 error

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Visual Studio 2005 error: ‘asp:UpdatePanel could not be set on property ‘ContentTemplate’

I suddenly got this error when I was working on a project in Visual Studio 2005 and trying to switch to the Designer view of a page: ‘asp:UpdatePanel’ could not be set on property ‘ContentTemplate’ The application rebuilds fine and even runs fine, but I just cannot switch to the Designer view. Here is what I did to solve the problem after some search: 1. Exit Visual Studio 2005 2. Go to Administrative Tools –>Services, […]