Async in C# 5.0: Unleash the Power of Async

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Table of Contents Preface Intended Audience How to Read This Book Conventions Used in This Book Using Code Examples Safari® Books Online How to Contact Us Acknowledgments Chapter 1. Introduction Asynchronous Programming What’s So Great About Asynchronous Code? What Is Async? What Async Does Async Doesn’t Solve Everything Chapter 2. Why Programs Need to Be Asynchronous Desktop User Interface Applications An Analogy: The Cafe Web Application Server Code Another Analogy: The Restaurant Kitchen Silverlight, Windows Phone, and Windows 8 Parallel Code An Example Chapter 3. Writing Asynchronous Code Manually Some Asynchronous Patterns Used in .NET The Simplest Asynchronous Pattern An Introduction to Task The Problem with Manual Asynchrony Converting the Example to Use Manual Asynchronous Code Chapter 4. Writing Async Methods Converting the Favicon Example to Async Task and await Async Method Return Types Async, Method Signatures, and Interfaces The return Statement in Async Methods Async Methods Are Contagious Async Anonymous Delegates and Lambdas Chapter 5. What await Actually Does Hibernating and Resuming a Method The State of the Method Context Where await Can’t Be Used catch and finally Blocks lock Blocks LINQ Query Expressions Unsafe Code Exception Capture Async Methods Are Synchronous Until Needed Chapter 6. The Task-Based Asynchronous Pattern What the TAP Specifies Using Task for Compute-Intensive Operations Creating a Puppet Task Interacting with Old Asynchronous Patterns Cold and Hot Tasks Up-Front Work Chapter 7. Utilities for Async Code Delaying for a Period of Time Waiting for a Collection of Tasks Waiting for Any One Task from a Collection Creating Your Own Combinators Cancelling Asynchronous Operations Returning Progress During an Asynchronous Operation Chapter 8. Which Thread Runs My Code? Before the First await During the Asynchronous Operation SynchronizationContext in Detail await and SynchronizationContext The Lifecycle of an Async Operation Choosing Not to Use SynchronizationContext Interacting with Synchronous Code Chapter 9. Exceptions in Async Code Exceptions in Async Task-Returning Methods Unobserved Exceptions Exceptions in Async void Methods Fire and Forget AggregateException and WhenAll Throwing Exceptions Synchronously finally in Async Methods Chapter 10. Parallelism Using Async await and locks Actors Using Actors in C# Task Parallel Library Dataflow Chapter 11. Unit Testing Async Code The Problem with Unit Testing in Async Writing Working Async Tests Manually Using Unit Test Framework Support Chapter 12. Async in ASP.NET Applications Advantages of Asynchronous Web Server Code Using Async in ASP.NET MVC 4 Using Async in Older Versions of ASP.NET MVC Using Async in ASP.NET Web Forms Chapter 13. Async in WinRT Applications What Is WinRT? IAsyncAction and IAsyncOperation Cancellation Progress Providing Asynchronous Methods in a WinRT Component Chapter 14. The Async Compiler Transform—in Depth The stub Method The State Machine Struct The MoveNext Method Your Code Transforming Returns to Completions Get to the Right Place in the Method Pausing the Method for the await Resuming after the Await Completing Synchronously Catching Exceptions More Complicated Code Writing Custom Awaitable Types Interacting with the Debugger Chapter 15. The Performance of Async Code Measuring Async Overhead Async Versus Blocking for a Long-Running Operation Optimizing Async Code for a Long-Running Operation Async Versus Manual Asynchronous Code Async Versus Blocking Without a Long-Running Operation Optimizing Async Code Without a Long-Running Operation Async Performance Summary