Ok, so, my visual studio is broken. I say this NOT prematurely, as it was my first response to see where I had messed up in my code. When I add controls to the page I can\'t
For me, deleting/renaming the files in the following location worked:
C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\myvirtualwebsite\e331e0a9