提到，无本文章扩展3.5包含System.Threading.dll的回迁版本，但在接收站点下载最新版本时，本次大会是无处可看和Parallel类似乎没有present任何附带的组件无论是。任何人都知道发生了什么事，以本次大会？

This article mentions that the Reactive Extensions for 3.5 contains a backported version of System.Threading.dll but when downloading the latest version from the Rx Site this assembly is nowhere to be seen and the Parallel class seems to be not present in any of the included assemblies either. Anyone happen to know what happened to this assembly?

更新：我已经找到了工作的下载链接，一个旧接收释放仍包含回迁的System.Threading组件的这里。

UPDATE: I've found a working download link for an older Rx Release that still contains the backported System.Threading assembly here.

推荐答案

的http://blogs.msdn.com/b/rxteam/archive/2012/08/15/reactive-extensions-v2-0-has-arrived.aspx

最新版本呈现.NET 4.0或4.5的依赖关系，所以也没有必要为一个向后移植TPL运行

The latest version takes a dependency on .NET 4.0 or 4.5 , so there is no need for a back ported TPL runtime.