public string RemoveGroup(int ID)
 {
     string str;
     if (IsAuthenticated(out str))
     {
         try
         {
             GroupInfo info = new GroupInfo();
             info.GroupID = ID;
             info.Remove();
             str += ", \"IsOK\": true";
         }
         catch
         {
             str += ", \"IsOK\": false";
         }
     }
     return str;
 }