异步编程

https://msdn.microsoft.com/magazine/jj991977

http://2sharings.com/2014/net-4-5-task-run-parallel-for-winform-cross-multiple-threads-update-ui-demo

C#并发编程经典实例

Concurrency.in.Csharp.Cookbook.2014.5

Sample：

https://code.msdn.microsoft.com/ParExtSamples

https://msdn.microsoft.com/en-us/library/dd537609(v=vs.110).aspx

task.delay && thread.sleep code example

https://code.msdn.microsoft.com/ThreadSleep-vs-TaskDelay-766b46b7

Async异常处理：

http://blog.zhaojie.me/2012/04/exception-handling-in-csharp-async-await-2.html

https://msdn.microsoft.com/zh-cn/library/jj619227.aspx

http://stackoverflow.com/questions/9846615/async-task-whenall-with-timeout

timeout:

http://stackoverflow.com/questions/9846615/async-task-whenall-with-timeout

VS2013Download下载

http://www.microsoft.com/zh-cn/download/confirmation.aspx?id=48138

http://ifeve.com/basic-thread-synchronization-5/

async and await

https://www.simple-talk.com/dotnet/.net-framework/the-.net-4.5-asyncawait-feature-in-promise-and-practice/

https://blogs.msdn.microsoft.com/pfxteam/2012/04/12/asyncawait-faq/