title: web.config file reverting to previous after build?
body: <p>I'm having a puzzling problem with my <code>web.config</code> file on Visual Studio 2015. I open the project, open the <code>web.config</code> file and update a connection string to point to a different database source. I save the change and then close the <code>web.config</code> file. If I open back up the <code>web.config</code> file, the updates that I made are still there. But after I do a build, if I open the <code>web.config</code> file my update has reverted to what was there previously. Any ideas why?</p>