System.Data.DataTable.RaiseRowChanging C# (CSharp) Method

        private DataRowChangeEventArgs RaiseRowChanging(DataRowChangeEventArgs args, DataRow eRow, DataRowAction eAction, bool fireEvent)
        {
            // check all constraints
            if (EnforceConstraints && !_inLoad)
            {
                int columnCount = _columnCollection.Count;
                for (int i = 0; i < columnCount; ++i)
                {
                    DataColumn column = _columnCollection[i];
                    if (!column.Computed || eAction != DataRowAction.Add)
                    {
                        column.CheckColumnConstraint(eRow, eAction);
                    }
                }

                int constraintCount = _constraintCollection.Count;
                for (int i = 0; i < constraintCount; ++i)
                {
                    _constraintCollection[i].CheckConstraint(eRow, eAction);
                }
            }

            if (fireEvent)
            {
                args = RaiseRowChanging(args, eRow, eAction);
            }

            if (!_inDataLoad)
            {
                // cascade things...
                if (!MergingData && eAction != DataRowAction.Nothing && eAction != DataRowAction.ChangeOriginal)
                {
                    CascadeAll(eRow, eAction);
                }
            }
            return args;
        }