Welcome to Essential C#


The Comprehensive, Expert Guide to C# Language Programming

Written by Mark Michaelis and Benjamin Michaelis with Eric Lippert & Kevin Bost

Essential C# is a well-organized, no-fluff guide to C# for programmers at all levels of experience. Reflecting the most important C# features from 3.0 through 12.0 and including modern programming patterns, it will help you write code that’s simple, powerful, robust, secure, and maintainable.

World-class C# expert Mark Michaelis and Benjamin Michaelis present a complete tutorial and reference for the entire language, including expert coverage of key C# enhancements, C#’s use with .NET Core/.NET Standard, and cross-platform compilation. They illustrates key C# constructs with succinct examples, and presents best-practice coding guidelines.


Essential C# Book

Check out the interactive and comprehensive guide to the C# coding language to expand your development knowledge and enhance your skill set at your own pace. The site includes everything developers need to master C# and is an excellent tool for beginners to experts.

Welcome to one of the most venerable and trusted franchises you could dream of in the world of C# books—and probably far beyond!
From the Foreword by Mads Torgersen
C# Lead Designer, Microsoft

Web Features Coming Soon

Hyperlinking

Easily navigate to interesting and relevant sites as well as related sections in Essential C#.

Content Coming Soon

Experimental attribute

New feature from C# 12.0.

Source Generators

A newer .NET feature.

C# 13.0 Features

Various new features coming in C# 13.0.

Recently Completed

AI Chat Assistant

Chat with an AI assistant that has access to Essential C# book content from a floating widget available on every page. Supports streaming responses, markdown rendering, and saved conversation history. Requires sign-in.

Client-side Compiler

Write, compile, and run C# code snippets right from your browser using the integrated Try .NET editor.

Interactive Code Listings

Edit, compile, and run the code listings found throughout Essential C#. Runnable listings show a Run button that opens an interactive editor.