So I change source view to design view and switch back and forth, even I reopen my solution and rebuild, it still cannot be found.
I have developed a small application in Share Point.
For reference I am using Visual Studio 2008 on a C# . I was in the middle of converting a Data Grid object to a Grid View.
I figured I could simply change a couple tag names and be done with it.
Thanks for finding it ( I'd searched this forum, but didn't know about that one ...