Bit地图保存失真

Bitmap保存失真，请指教
Bitmap保存时失真，请问如何修改？

C# code

Bitmap bitmap = new Bitmap(200, 200, System.Drawing.Imaging.PixelFormat.Format32bppArgb);Graphics g = Graphics.FromImage(bitmap);g.DrawString("Bitmap方法外部测试", new Font("宋体", 6), new SolidBrush(Color.Black), 2, 2);g.Dispose();bitmap.Save("D://bmp.bmp");bitmap.Dispose();

[解决办法]
参考下面：
http://tech.ddvip.com/2009-05/1243237863120924.html
[解决办法]
加这3句看看：
g.SmoothingMode = SmoothingMode.HighQuality;
g.CompositingQuality = CompositingQuality.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;

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