Handling exceptions in the asynchronous operations

This recipe will describe how to deal with exception handling using asynchronous functions in C#. We will learn how to work with aggregate exceptions in case you use await with multiple parallel asynchronous operations.

Getting ready

To step through this recipe, you will need Visual Studio 2012. There are no other prerequisites. The source code for this recipe can be found at BookSamples\Chapter5\Recipe5.

How to do it...

To understand handling exceptions in asynchronous operations, perform the following steps:

1. Start Visual Studio 2012. Create a new C# Console Application project.

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

   using System;
   using System.Threading;
   using System.Threading.Tasks;

3. Add the following code snippet below the Main method:

   async static Task AsynchronousProcessing()
   {
     Console.WriteLine("1. Single exception");
   
     try
     {
       string result = await GetInfoAsync("Task 1", 2);
       Console.WriteLine(result);
     }
     catch...