VS.NET uses the information that you enter into the XML comments, so if you
have a function, just place the cursor on the line above it and type "///"
and VS.NET will automatically create all the empty tags that you need, i.e.,

       /// <summary>
       ///
       /// </summary>
       /// <param name ="param1"></param>
       /// <param name ="param2"></param>
       /// <returns></returns>
       public string functionName (int param1, bool param2)

Whatever text you type into the tags will appear in Intellisense, but you
may need to rebuild the project for the values to appear.