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  1. using System;
  2. using System.Threading;
  3. using System.Threading.Tasks;
  4.  
  5. class Program {
  6.   public static int Add(int a, int b) {
  7.      Console.WriteLine("Child thread starts");
  8.      int result = a + b;
  9.  
  10.      Console.WriteLine("Child thread goes to sleep");
  11.      Thread.Sleep(5000); // the thread is paused for 5000 milliseconds
  12.  
  13.      Console.WriteLine("Child thread resumes and finishes");
  14.      return result;
  15.   }
  16.  
  17.   public static async Task<int> AddAsync(int a, int b)
  18.   {
  19.     int result = await Task.Run(() => Add(a, b));
  20. 	Console.WriteLine("Result computed = {0}", result);
  21. 	return result;
  22.   }
  23.  
  24.   public static void Main(string[] args) {
  25.      int x = 30;
  26.      int y = 12;
  27.  
  28.      Console.WriteLine("Main thread starts");
  29.      Task<int> task = AddAsync(x, y);
  30.  
  31.      Console.WriteLine("Main thread waiting");
  32.      int sum = task.Result;
  33.      Console.WriteLine("Main thread finishes, sum = {0}", sum);
  34.   }
  35. }
Success #stdin #stdout 0.04s 17532KB
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stdin
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Standard input is empty
stdout
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Main thread starts
Child thread starts
Child thread goes to sleep
Main thread waiting
Child thread resumes and finishes
Result computed = 42
Main thread finishes, sum = 42
https://ideone.com/nNe8d0
Multithreading in C#: async and await
language:
C# (gmcs 5.20.1)
created:
343 days ago
visibility:
secret

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