public new void SetChildItems(string[][] data) { this.childItems.Populate(data); DataGridView grid = this.childItems.Grid; DataGridViewRowCollection rows = grid.Rows; int rowCount = rows.GetRowCount(DataGridViewElementStates.None); while (rowCount > 0) { --rowCount; DataGridViewCellCollection cellsInRow = rows[rowCount].Cells; cellsInRow[cellsInRow.Count - 1].Value = data[rowCount][3]; } }