一个适合初学者参考学习的C#多线程监视器程序，创建3个线程，模拟多线程运行，并绑定TestRun方法，定义线程的绑定方法，在同步对象上获取排他锁，模拟做一些耗时的工作。-A suitable reference for beginners to learn C# multi-threaded monitor the program to create three threads to simulate multiple threads running, and bind the TestRun method defines the thread-bound method to obtain an exclusive lock on a synchronization object to simulate some of the time-consuming the work.