How to detect whether a 'CTRL' key or a 'SHIFT' key is down in WinForms GridControl?

void gridControl1_MouseDown(object sender, MouseEventArgs e)
{
    // Checks whether the Ctrl key is down.
    if ((Control.ModifierKeys & Keys.Control) != 0)
    {
        Console.WriteLine("Control Key is down");
    }
    //Checks whether the Shift key is down.
    if ((Control.ModifierKeys & Keys.Shift) != 0)
    {
        Console.WriteLine("Shift Key is down");
    }
}

Private Sub gridControl1_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)
    'Checks whether the Ctrl key is down.
    If (Control.ModifierKeys And Keys.Control) <> 0 Then
        Console.WriteLine("Control Key is down")
    End If
    'Checks whether the Shift key is down.
    If (Control.ModifierKeys And Keys.Shift) <> 0 Then
        Console.WriteLine("Shift Key is down")
    End If
End Sub