HttpWebResponse获取网页图片转换为Image时提示参数无效的解决方法

先看上图，通过工具分析得知，原来是图片被gzip压缩过了

 

知道什么原因，当然解决就好办了

HttpWebResponse httpWebResponse = httpWebRequest.GetResponse() as HttpWebResponse

Stream repStream = httpWebResponse.GetResponseStream()

 using (GZipStream gs = new GZipStream(repStream, CompressionMode.Decompress))
{
     System.Drawing.Image image = System.Drawing.Image.FromStream(gs, true, true);
}