public void Create(OperationModel tbl)
 {
     try
     {
         OperationDataAccessLayer objCrd = new OperationDataAccessLayer();
         objCrd.AjouterOperation(tbl);
     }
     catch
     {
         throw;
     }
 }
 public int DernierOperation()
 {
     try
     {
         OperationDataAccessLayer objCrd = new OperationDataAccessLayer();
         int dernier_operation           = objCrd.DernierOperation();
         return(dernier_operation);
     }
     catch
     {
         throw;
     }
 }