How to move many records have the same value between two grids

        private void MoveManyRecords(DataGridView dtL, DataGridView dtR, int iColToCheck)
        {
            if (dtL.CurrentCell == null) return;
            int iCurrentRowIndex = 0, i = 0;
            int iLastRow = 0;
            iCurrentRowIndex = dtL.CurrentCell.RowIndex;
            string strColToCheckValue = dtL[iColToCheck, iCurrentRowIndex].Value.ToString();

            int j = 0;
            while (j < dtL.Rows.Count)
            {
                if (dtL[iColToCheck, j].Value.ToString().Equals(strColToCheckValue))
                {
                    dtR.Rows.Add();
                    iLastRow = dtR.Rows.Count - 1;
                    for (i = 0; i < dtL.Columns.Count; i++)
                    {
                        dtR[i, iLastRow].Value = dtL[i, j].Value;
                    }
                    dtR.Rows[iLastRow].Selected = true;
                    dtR.CurrentCell = dtR.Rows[iLastRow].Cells[1];
                    dtL.Rows.RemoveAt(j);
                }
                else
                {
                    j++;
                }
            }
        }