private void pictureBox1_MouseMove_Click(object sender, EventArgs e)
{
if (mouseDown)
{
bitmapClone = (Bitmap)bitmap.Clone();
x1 = e.X; y1 = e.Y;
MyDrawing.drawline(x0, y0, x1, y1, bitmap, pictureBox1, color);
bitmap = bitmapClone;
}
}
private void button1_Click(object sender, EventArgs e)
{
MyDrawing.drawline(50, 20, 200, 20, bitmap, pictureBox1, Color.Green);
}