Book Image

Microsoft .NET Framework 4.5 Quickstart Cookbook

By : Jose Luis Latorre
Book Image

Microsoft .NET Framework 4.5 Quickstart Cookbook

By: Jose Luis Latorre

Overview of this book

With about ten years since its first release, Microsoft's .NET Framework 4.5 is one of the most solid development technologies to create casual, business, or enterprise applications. It has evolved into a very stable framework and solid framework for developing applications, with a solid core, called the CLR (Common Language Runtime) Microsoft .NET Framework 4.5 includes massive changes and enables modern application and UI development."Microsoft .Net Framework 4.5 Quickstart Cookbook" aims to give you a run through the most exciting features of the latest version. You will experience all the flavors of .NET 4.5 hands on. The “How-to” recipes mix the right ingredients for a final taste of the most appetizing features and characteristics. The book is written in a way that enables you to dip in and out of the chapters.The book is full of practical code examples that are designed to clearly exemplify the different features and their applications in real-world development. All the chapters and recipes are progressive and based on the fresh features on .NET Framework 4.5.The book will begin by teaching you to build a modern UI application and improve it to make it Windows 8 Modern UI apps lifecycle model-compliant. You will create a portable library and throttle data source updating delays. Towards the end of the book, you will create you first Web API.
Table of Contents (19 chapters)
Microsoft .NET Framework 4.5 Quickstart Cookbook
About the Author
About the Reviewers

Understanding async and await in .NET 4.5

The new asynchronous capabilities of .NET 4.5 rely on the async and await modifiers. Basically we have two important points here:

  • The async modifier indicates to the compiler that a method or lambda expression is asynchronous—we call them async methods.

  • The await operator, which can only be used within an async method, is applied to a task to suspend execution of the method until the task is complete. Meanwhile, the control is returned to the caller of that method.

How to do it...

Here we will use the async and await features in a basic way to clearly understand them.

  1. Create a new Visual Studio project of type Console Application named caAsyncAwait.

  2. Add a reference to the System.Net.Http assembly.

  3. In the Program.cs file, add the following using clauses:

    using System.Net;
    using System.IO;
  4. Next, add the following methods:

    Static async Task HttpTestAsync(String url) {
    byte[] result = await GetURLContentsAsync(url);
    Console.WriteLine("Received {0,8} bytes...