selecting the entire row in a datagrid when the user clicks on a cell in the row

I have tried the code below but the entire row still isn't selected only the cell clicked on:

private void dataGrid1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
 
{
 
     System.Drawing.Point pt = new Point(e.X, e.Y);
 
     DataGrid.HitTestInfo hti = dataGrid1.HitTest(pt);
 
     if(hti.Type == DataGrid.HitTestType.Cell)
 
     {
 
          dataGrid1.CurrentCell = new DataGridCell(hti.Row, hti.Column);
 
          dataGrid1.Select(hti.Row);
 
     }
 
}