.net库提供了一个性能监控包，我们能够用来监控系统或者任何应用程序。这个程序利用它来监控网络的发送、接收的数据包数量，从而计算出网络的速度。-The .NET Class Library provides a set of performance counters that you can use to track the performance both of the system and of an application. This program makes use of counte