I am unable to edit any files in a project in Visual Studio 2013. It only happens in one project. If I open a different project I am able to type fine, but once I go back
I had this same issue today (couldn't even edit brand new files), but it turned out to be due to the "Source Control Plug-In". I use AnkhSVN and performed an update when prompted yesterday. For whatever reason this left me unable to edit any file types besides JSON. Here are the steps I went through to fix it:
I was able to edit files again after this.