在标签页上画一条线

Question

编辑：

我设法添加picturebox，但我不知道如何在其上划一条线。

private void buttonDraw_Click_1(object sender, EventArgs e)

{
pictureBoxDraw.BackColor = Color.Black;
pictureBoxDraw.BorderStyle = BorderStyle.Fixed3D;

Graphics g = e.Graphics // I don't know this method.. I just need to draw a line here..
}