Man, is it annoying when VS opens every single file you touch (just click it!) in the Solution Explorer? I’ve been irritated by VS opening a file just because you click it. I want it to be opened only when you want it to open. I other words I want it to open when double-clicked.
This can be changed in: Tools – Options – Environment – Tabs and Windows – Preview Tab (see screenshot).
Just uncheck the Preview Tab and you are good to go.