I'm getting the “missing a using directive or assembly reference” and no clue what's going wrong

Question

I\'m trying to allow a user to enter data into a textbox that will be added to the web.config file. I\'ve added the relevent lines to the web.config file but when I make thi

Answer 1

This problem would be caused by your application missing a reference to an external dll that you are trying to use code from. Usually Visual Studio should give you an idea about which objects that it doesn't know what to do with so that should be a step in the right direction.

You need to look in the solution explorer and right click on project references and then go to add -> and look up the one you need. It's most likely the System.Configuration assembly as most people have pointed out here while should be under the Framework option in the references window. That should resolve your issue.