how to draw a line on a image?
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i want to draw a line on a bmp image which is pass into a method using drawline method in C#

    public void DrawLineInt(Bitmap bmp)
    {
    
    Pen blackPen = new Pen(Color.Black, 3);
  
    int x1 = 100;
    int y1 = 100;
    int x2 = 500;
    int y2 = 100;
    // Draw line to screen.
    e.Graphics.DrawLine(blackPen, x1, y1, x2, y2);
    }


this give a error.So i want to know how to include paint event here 
(PaintEventArgs e  )

and also want to know how to pass parameters when we calling drawmethod?
example

    DrawLineInt(Bitmap bmp);

