WebClient.DownloadDataAsync冻结了我的UI

遇到同样的问题,并找到了解决方案.这里相当复杂的讨论:http://social.msdn.microsoft.com/Forums/en-US/a00dba00-5432-450b-9904-9d343c11888d/webclient-downloadstringasync-freeze-my-ui?forum= ncl

简而言之,问题是Web客户端正在搜索代理服务器并挂起应用程序.以下解决方案有助于:

WebClient webClient = new WebClient();
webClient.Proxy = null;
... Do whatever else ...