private void dgYY_Scroll(object sender, ScrollEventArgs e)

        {

            if (this.dgFee.RowCount > )

            {

                dgFee.FirstDisplayedScrollingRowIndex = Math.Min(dgYY.FirstDisplayedScrollingRowIndex, this.dgFee.RowCount - );

                dgFee.HorizontalScrollingOffset = dgYY.HorizontalScrollingOffset;

            }

        }

        private void dgFee_Scroll(object sender, ScrollEventArgs e)

        {

            if (this.dgYY.RowCount > )

            {

                dgYY.FirstDisplayedScrollingRowIndex = Math.Min(dgFee.FirstDisplayedScrollingRowIndex, this.dgYY.RowCount - );

                dgYY.HorizontalScrollingOffset = dgFee.HorizontalScrollingOffset;

            }

        }