Learning C# in Practice

Introduction

The book "Learning Hard C#" by Patrick Mancier, published in 2022, is a practical guide to the C# language and the .NET platform. Unlike many academic textbooks, this book is focused on rapid immersion into real-world development: minimal theory, maximum code and examples. Its 292-page volume allows covering key topics without unnecessary fluff, making it an excellent choice for those who want to start writing in C# today.

What the book is about

The book is structured as a sequential journey from installing tools to creating full-fledged applications. The author begins with the basics of C# syntax, data types, and control structures, then moves on to object-oriented programming (classes, inheritance, polymorphism), working with collections, exception handling, and database interaction via ADO.NET and Entity Framework. Separate chapters are dedicated to asynchronous programming (async/await), file handling, serialization, and the basics of Windows Forms and ASP.NET Core. Each topic is accompanied by practical examples and small projects that can be immediately run and modified.

Who this book is for

The book is intended for beginner developers who already have a basic understanding of programming (for example, know Python or JavaScript) and want to learn C#. It will also be useful for those transitioning from other languages (Java, C++) who want to quickly adapt to the .NET ecosystem. Experienced programmers looking for a reference on C# 10 and .NET 6 will find many practical tips in the book, but for in-depth study of advanced topics (e.g., reflection, unsafe code, multithreading), additional sources will be required.

What the reader will learn

• Basics of C# syntax: variables, data types, operators, loops, methods.
• Object-oriented programming: classes, interfaces, abstract classes, operator overloading.
• Working with collections: lists, dictionaries, LINQ queries.
• Error handling: exceptions, try-catch-finally blocks, creating custom exceptions.
• File and stream handling: reading/writing, JSON/XML serialization.
• Asynchronous programming: async/await, Task, parallel computing.
• Databases: connecting to SQL Server, executing queries via ADO.NET and Entity Framework Core.
• Creating applications: Windows Forms (desktop) and web applications on ASP.NET Core.
• Developer tools: Visual Studio, debugging, NuGet package management.

Strengths

The main advantage of the book is its practical focus. Each chapter contains at least 3–5 code examples that can be copied and run. The author uses modern versions of C# (10) and .NET (6), ensuring the material's relevance. The book's structure is logical: from simple to complex, with a gradual increase in difficulty. The chapter on Entity Framework deserves special mention — it provides a clear understanding of working with databases without unnecessary theory. The book also includes tips on code style, variable naming, and project organization, which is important for beginners.

Who it is recommended for

I recommend this book to everyone who wants to quickly start programming in C# and create real applications. It is ideal for self-study, as well as supplementary material for .NET courses. If you already know another programming language and want to learn C# in a couple of weeks — "Learning Hard C#" will be an excellent start. However, if you are looking for a deep theoretical exposition with mathematical foundations, it is better to turn to classic textbooks (e.g., "C# 10 in a Nutshell").