Intermittently at times, Visual Studio for some odd reason, refuses to recognize web controls or C# syntax during a build/compile that you know is fine. You’ve included all the right usings, assembly or project references, and the syntax you know worked before, but for some reason it just decides to piss you off when you try to compile by stating it is not familiar with the syntax or control. There are a slew of things one can try in order to sort of kick Visual Studio in the pants when you try to build, and it still can’t seem to notice those web controls even when they are in the designer file and there are no conflicts or syntax issues. Today I has such an issue again. When you exhaust all the tricks of the trade, the next best thing to do is ultimately just recreate the file itself and paste back in your code.