Using the await operator for the execution of parallel asynchronous tasks

In this recipe, you will learn how to use await to run asynchronous operations in parallel instead of the usual sequential execution.

Getting ready

To step through this recipe, you will need Visual Studio 2015. There are no other prerequisites. The source code for this recipe can be found at BookSamples\Chapter5\Recipe4.

How to do it...

To understand the use of the await operator for parallel asynchronous task execution, perform the following steps:

1. Start Visual Studio 2015. Create a new C# console application project.

2. In the Program.cs file, add the following using directives:

   using System;
   using System.Threading.Tasks;
   using static System.Console;
   using static System.Threading.Thread;

3. Add the following code below the Main method:

   static async Task AsynchronousProcessing()
   {
     Task<string> t1 = GetInfoAsync("Task 1", 3);
     Task<string> t2 = GetInfoAsync("Task 2", 5);
   
     string[] results = await Task.WhenAll(t1...