C# 截屏

	public Bitmap CopyScreen()
	{
	    Rectangle tScreenRect = new Rectangle(0, 0, Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
	    Bitmap bitmap = new Bitmap(tScreenRect.Width, tScreenRect.Height);
	    Graphics graphics = Graphics.FromImage(bitmap);
	    graphics.CopyFromScreen(0, 0, 0, 0, tScreenRect.Size);
	    graphics.DrawImage(bitmap, 0, 0, tScreenRect, GraphicsUnit.Pixel);
	    return bitmap;
	}