C# 5.0 Async/Await Demo Code

I’ve published the sample code I use to demonstrate the use of async/await in C# 5.0. You can find it here.

Projects

PauloMorgado.AyncDemo.WebServer

This project is a simple web server implemented as a console application using Microsoft ASP.NET Web API self hosting and serves an image (with a delay) that is accessed by the other projects.

This project has a dependency on Json.NET due to the fact the the Microsoft ASP.NET Web API hosting has a dependency on Json.NET.

The application must be run on a command prompt with administrative privileges or a urlacl must be added to allow the use of the following command:

netsh http add urlacl url=http://+:9090/ user=machine\username

To remove the urlacl, just use the following command:

netsh http delete urlacl url=http://+:9090/

PauloMorgado.AsyncDemo.WindowsForms

This Windows Forms project contains three regions that must be uncommented one at a time:

Sync with WebClient

This code retrieves the image through a synchronous call using the WebClient class.

Async with WebClient

This code retrieves the image through an asynchronous call using the WebClient class.

Async deadlock

This code how async operations can still deadlock.

Async with HttpClient with cancelation

This code retrieves the image through an asynchronous call with cancelation using the HttpClient class.

PauloMorgado.AsyncDemo.Wpf

This WPF project contains three regions that must be uncommented one at a time:

Sync with WebClient

This code retrieves the image through a synchronous call using the WebClient class.

Async with WebClient

This code retrieves the image through an asynchronous call using the WebClient class.

Async deadlock

This code how async operations can still deadlock.

Async with HttpClient with cancelation

This code retrieves the image through an asynchronous call with cancelation using the HttpClient class.