Kadr.Data.DepartmentHistory.OnValidate C# (CSharp) Method

partial         void OnValidate(System.Data.Linq.ChangeAction action)
        {
            if ((action == ChangeAction.Insert) || (action == ChangeAction.Update))
            {

                if (DateBegin == null)
                    throw new ArgumentNullException("Дата изменения.");
                if (((Prikaz as Kadr.Data.Common.INull).IsNull()) || (Prikaz == null))
                    throw new ArgumentNullException("Приказ изменения.");
            }
        }