How to draw a line in Form_Load of a Form?

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C#

I want to draw a line from one point to another on a Form and code it in Form_Load() event (not use Paint event):

private void Form1_Load(object sender, EventArgs e)
        {
            Pen pen = new Pen(Brushes.Blue,1);
            Graphics m = this.CreateGraphics();
            m.DrawLine(pen, 0, 0, 100, 100);
        }

But when i run, i dont get any result! Why? Hope you help me solve this problem. Thanks.