public ActionResult _EditGroup(string id_group, string name)
 {
     if (ModelState.IsValid)
     {
         GroupDTO groupDTO = new GroupDTO();
         groupDTO.id_group  = id_group;
         groupDTO.groupName = name;
         if (groupProvider.putGroup(groupDTO).Result)
         {
             return(Json(groupDTO));
         }
     }
     return(new HttpStatusCodeResult(404, "Can't find that"));
 }