使用WebClient类：
using System.Net;//...WebClient Client = new WebClient ();Client.DownloadFile("http://i.stackoverflow.com/Content/Img/stackoverflow-logo-250.png", @"C:folderstackoverflowlogo.png");
使用WebClient类：
using System.Net;//...WebClient Client = new WebClient ();Client.DownloadFile("http://i.stackoverflow.com/Content/Img/stackoverflow-logo-250.png", @"C:folderstackoverflowlogo.png");名师互学网 版权所有 (c)2021-2022 ICP备案号：晋ICP备2021003244-6号
