private void button1_Click(object sender, EventArgs e)
{
Rectangle r = Screen.PrimaryScreen.Bounds;
Image img = new Bitmap(r.Width, r.Height);
Graphics g = Graphics.FromImage(img);
g.CopyFromScreen(new Point(0, 0), new Point(0, 0), r.Size);
img.Save(@"E:\tmpa.bmp");
}
