protected override void Save()
        {
            TrainingProductManager mgr = new TrainingProductManager();

            if (Mode == "Add")
            {
                // Add data to databas here
                mgr.Insert(Entity);
            }
            else
            {
                mgr.Update(Entity);
            }

            ValidationErrors = mgr.ValidationErrors;
            if (ValidationErrors.Count > 0)
            {
                IsValid = false;
            }

            if (!IsValid)
            {
                if (Mode == "Add")
                {
                    AddMode();
                }
                else
                {
                    EditMode();
                }
            }
        }