// AddGroupMember()
 // desc: Method calls PowerShellComponent command AddGroupMember, adds user to group
 // params: Dictionary<string, string> attributes - Dictionary object, contains attributes for user
 // method: public
 // return: string, XML string of ExchangeUser object
 public static string AddGroupMember(Dictionary<string, string> attributes)
 {
     PowerShellComponent.ManagementCommands objManage = null;
     string Results = null;
     try
     {
         objManage = new PowerShellComponent.ManagementCommands();
         Results = objManage.AddGroupMember(attributes);
     }
     catch (Exception e)
     {
         return e.Message;
     }
     objManage = null;
     return Results;
 }