说明：  单个写入程序/多个阅读程序在.Net 类库中其实已经提供了实现，即 System.Threading.ReaderWriterLock 类。本文通过对常见的单个写入/多个阅读程序的分析来探索c# 的多线程编程。
(Single writer/multiple readers program. Net class library already provides a realization that System.Threading.ReaderWriterLock classes. Based on the common single writer/multiple readers to explore the analysis of multi-threaded programming c#.)