private void button1_Click(object sender, EventArgs e)
{
Bitmap bit = new Bitmap(this.Width, this.Height);//實例化一個和窗體一樣大的bitmap
Graphics g = Graphics.FromImage(bit);
g.CompositingQuality = CompositingQuality.HighQuality;//質量設為最高
g.CopyFromScreen(this.Left, this.Top, 0, 0, new Size(this.Width, this.Height));//保存整個窗體為圖片
//g.CopyFromScreen(panel游戲區 .PointToScreen(Point.Empty), Point.Empty, panel游戲區.Size);//只保存某個控件（這里是panel游戲區）
bit.Save("D:\\weiboTemp.png");//默認保存格式為PNG，保存成jpg格式質量不是很好
}