C#根据服务器图片地址获取Image对象

string url = 服务器图片路径；
System.Net.WebRequest webreq = System.Net.WebRequest.Create(url);
System.Net.WebResponse webres = webreq.GetResponse();
using(System.IO.Stream stream = webres.GetResponseStream())
 {
   Image image = Image.FromStream(stream);
 }