Book Image

C# Programming Cookbook

By : Dirk Strauss
Book Image

C# Programming Cookbook

By: Dirk Strauss

Overview of this book

During your application development workflow, there is always a moment when you need to get out of a tight spot. Through a recipe-based approach, this book will help you overcome common programming problems and get your applications ready to face the modern world. We start with C# 6, giving you hands-on experience with the new language features. Next, we work through the tasks that you perform on a daily basis such as working with strings, generics, and lots more. Gradually, we move on to more advanced topics such as the concept of object-oriented programming, asynchronous programming, reactive extensions, and code contracts. You will learn responsive high performance programming in C# and how to create applications with Azure. Next, we will review the choices available when choosing a source control solution. At the end of the book, we will show you how to create secure and robust code, and will help you ramp up your skills when using the new version of C# 6 and Visual Studio
Table of Contents (21 chapters)
C# Programming Cookbook
Credits
About the Author
Acknowledgements
About the Reviewer
www.PacktPub.com
Preface
Index

Return types of asynchronous functions


In asynchronous programming, the async methods can have three possible return types. These are:

  • void

  • Task

  • Task<TResult>

We will have a look at each return type in the following recipe.

Getting ready

What could be the use of a void return type in asynchronous methods? Generally, void is used with event handlers. Just bear in mind that void returns nothing, so you can't wait for it. Therefore, if you call a void return type asynchronous method, your calling code should be able to continue executing code without having to wait for the asynchronous method to complete.

With asynchronous methods that have a return type of Task, you can utilize the await operator to pause the execution of the current thread until the called asynchronous method has completed. Keep in mind that an asynchronous method that returns a type of Task basically does not return an operand. Therefore, if it was written as a synchronous method, it would be a void return type method...