What is that?It's how you make your application multi-task to improve performance.It's how you keep the UI working while your app does stuff in the backgroundIt's concurrent programming, without parallel programming.And it's widely used.
This book is a course in how to write asynchronous programs in C#. It includes example code, explanations of the concepts involved, and practice exercises with answers. It aims to provide everything you need to learn, as you need it, all in one place.