public IHttpActionResult Put(int?id, [FromBody] TestVM testVM)
 {
     if (id == null || testVM == null || !testVM.isWalid())
     {
         return(BadRequest());
     }
     try
     {
         _testService.Change(id.GetValueOrDefault(), Mapper.Map <TestDTO>(testVM));
     }
     catch (BILException myExc)
     {
         return(InternalServerError(myExc));
     }
     return(Ok());
 }