C# ultimate document app

I just started to work with the ultimate version of visual studio 2012 for the first time. I am suppose to work on a C#.net application.

I think that I heard that you can use the ultimate edition of visual studio to document the application. Basically is there is a way to learn about the application electronically without the programmer needing to look at all the code. You can use the utlimate edition to determine where your code changes should go faster.

Thus if this is true, can you tell and/or [point me to a url that would explain how to accomplish this goal for me?