public bool SaveDepartment(Department department) { if (department.Id < 0) { throw new Exception("Department number cannot be negative"); } if (department.DeptName.Trim().Length <= 2) { throw new Exception("Department name is too short"); } if (department.Loc.Trim().Length <= 2) { throw new Exception("Department location is too short"); } return(_dal.SaveDepartment(department)); }