Unable to type in Visual Studio

Question

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

Answer 1

Happened to me today, for me the problem was with typescript files. I couldn't write in any .ts file, and this was because I created a tsconfig.json file, but didn't populate it yet (it was empty). Then I was interrupted and forgot I had this empty file, and it took me a while to realize this was the cause of the issue. This issue happened in visual studio 2015.