我可能失去了一些东西，但是当我使用Web客户端，并查找DownloadString方法（如在一本书的例子中），我只看到DownloadStringAsync。

I'm probably missing something here, but when I use WebClient and look for the DownloadString method (as found in a book example), I only see DownloadStringAsync.

导入什么我错过？

推荐答案

您使用Silverlight？只有异步版本可以在Silverlight。否则，.NET框架4及以下（1.x的除外）有DownloadString（）方法。

Are you using Silverlight? Only the Async version is available in Silverlight. Otherwise, the .NET 4 Framework and below (except 1.x) have the DownloadString() method.

http://msdn.microsoft.com/en-us/library/ms144200.aspx