1 using System;

 2 using System.Collections.Generic;

 3 using System.Linq;

 4 using System.Text;

 5 using System.Threading;

 6 using System.Threading.Tasks;

 7

 8 namespace ThreadMutex

 9 {

10     class Program

11     {

12         private static Mutex mutex = new Mutex();

13         private static int sum = 0;

14         static void Main(string[] args)

15         {

16             Task<int> task = new Task<int>(ThreadFunction);

17             task.Start();

18             Console.WriteLine($"{DateTime.Now} task started!");

19             Thread.Sleep(2000);

20             mutex.WaitOne();

21             Console.WriteLine($"{DateTime.Now} Get siginal in main!");

22             Console.WriteLine($"{DateTime.Now} Result is {task.Result}");

23         }

24         private static int ThreadFunction()

25         {

26             mutex.WaitOne();

27             for (int i = 0; i < 10; i++)

28             {

29                 sum  += i;

30                 Thread.Sleep(1000);

31             }

32             Console.WriteLine($"{DateTime.Now} Release mutex in ThreadFunction!");

33             mutex.ReleaseMutex();

34

35             return sum;

36         }

37     }

38 }