Asynchronous Programming in C#

Discover the practical power of Asynchronous Programming in C#, in this up-to-date course covering C# 11 and .NET 7. Gain the expertise needed to seamlessly architect and implement responsive, efficient and scalable applications.

In today’s dynamic software landscape, mastering asynchronous programming is more and more essential for crafting faster, hardware-optimized applications. As multi-core CPUs are now standard, parallel processing is the key to unlocking performance. While the demand for responsive interactions with remote services has only heightened the immense value that asynchronous programming can bring. 

In this comprehensive two-day course for seasoned C# and .NET developers seeking to master asynchronous programming, we will cover a diverse set of libraries and tools, from threads and locks to advanced features like concurrent collections, PLINQ, Tasks, and async/await. Each library’s purpose will be demystified, helping you to pinpoint the right solutions to specific challenges.

The course offers clear, accessible explanations of the underlying theory and key terms, as well as give hardware-level insights to solidify your grasp of the material. There will also be hands-on exercises that enable you to master and apply the intricacies of asynchronous programming. 

By the end of this course, you will be empowered to use asynchronous techniques to deeply optimize the efficiency, scalability and responsiveness of your applications. 

Target Audience:

Experienced C# / .Net developers who would like to enhance their applications using asynchronous and parallel programming.

Level: Advanced


To get the most out of this training, participants should have at least one year of experience as a C# developer and possess the skills covered in our Introduction to C#.NET course. A strong understanding of C#, including generics, lambdas, and LINQ, is crucial. While previous experience in parallel or async programming is not required, participants will benefit from familiarity with basic parallel concepts.

Course outline:

Introduction, Processes and Threads

  • Synchronous vs. Asynchronous programming
  • Processes
  • Threads

Thread pool

  • The cost of creating threads
  • Worker and I/O Threads
  • When not to use the thread pool


  • Creating tasks
  • Returning data from a task
  • Using Tasks or Threads?

Waiting for tasks

Error Handling in Asynchronous Programming

  • Exceptions in threads
  • Exceptions in tasks

Cancelling tasks

  • Cancellation Token Source
  • Tokens


Async – await

  • Async methods
  • Async state machine
  • The await keyword
  • Returning data from async methods
  • Async all the way
  • Async lambdas
  • Optimizing async/await
  • .GetAwaiter().GetResult()
  • WaitAsync

Task Schedulers

Synchronization contexts

  • SynchronizationContext vs. TaskScheduler
  • Capturing the context


Value Tasks

  • Tasks vs ValueTasks

Asynchronous Streams

  • IASyncEnumerable
  • ConfigureAwait
  • Cancellation of streams

Async LINQ

And much more…

About the autor and instructor: Tore Nestenius

Tore has worked as a consultant since 1997 and is a very knowledgeable system developer and has in the past worked for large companies like Ericsson and Flextronics. Early in his career, Tore Nestenius started Programmers Heaven - a portal with over 750 000 monthly users. He’s behind several other successful projects like CodePedia - a Wiki for developers, the Open Source project TNValidate, and the C# School e-book with over 100 000 downloads.

Andre relevante kurs

23. april
4 dager
Classroom Virtual On Demand