Asynchronous C# (.NET): The Complete Guide

The book "Asynchronous C# (.NET): The Complete Guide" is a comprehensive source of knowledge for developers who want to master asynchronous programming on the .NET platform. Unlike superficial tutorials, this book offers a systematic approach: from basic concepts to advanced techniques, including working with data channels, asynchronous streams, and thread pool configuration.

What is this book about?

You will learn how the .NET asynchronous model works from the inside. The book covers in detail:

• Task and ValueTask — creation, combination, cancellation, and error handling.
• async/await — the mechanism of operation, synchronization context, performance.
• Parallelism and concurrency — Parallel.For, PLINQ, Dataflow (TPL).
• IAsyncEnumerable and asynchronous data streams.
• Thread safety — locks, Concurrent collections, SemaphoreSlim.
• Real-world use cases — asynchronous HTTP requests, working with databases (Entity Framework Core), file I/O, WebSockets.

Who is this book for?

The book is intended for middle and senior C# developers who already have experience with the .NET platform and want to deepen their understanding of asynchronous programming. It will be useful for:

• Backend developers (ASP.NET Core, microservices).
• Engineers working with high-load systems.
• Specialists transitioning from synchronous to asynchronous code.
• Those who want to avoid deadlocks, race conditions, and resource leaks.

What will you learn after reading?

• How to properly design asynchronous APIs and libraries.
• How to optimize the performance of asynchronous code.
• How to use modern C# 10/11/12 features (IAsyncEnumerable, await foreach).
• How to work with asynchronous sockets, channels, and streams.
• How to test asynchronous code using xUnit and Moq.
• How to understand the internal workings of TaskScheduler and SynchronizationContext.

Each chapter contains practical examples that can be immediately applied in real projects. The code is written for .NET 8 and is compatible with .NET 6/7. The book will become a desktop reference for those who want to write fast, reliable, and scalable code in C#.

Note: The book is not an introduction to C# — a confident knowledge of syntax, OOP, and basic .NET principles is assumed.