static void Main(string[] args)
{
UserInputMonitor monitor = new UserInputMonitor();
Client client = new Client(monitor);
monitor.Run();
}
public Client(UserInputMonitor m)
{
m.OnUserRequest += new UserInputMonitor.UserRequest(this.ShowMessage);
//m.OnUserRequest+=new m.UserRequest(this.ShowMessage);
//注意这种写法是错误的，因为委托是静态的
}