C# documentation

Learn how to write any application using the C# programming language on the .NET platform.

Learn to program

Get Started

• Learn C# | Tutorials, courses, videos, and more

video

• C# beginner video series

Tutorial

• Self-guided tutorials
• In-browser tutorial

Reference

• C# on Q&A
• Languages on .NET tech community forums
• C# on Stack Overflow
• C# on Discord

Fundamentals

Overview

• A tour of C#
• Inside a C# program
• C# highlights video series

Concept

• Type system
• Object oriented programming
• Functional techniques
• Exceptions
• Coding style

Tutorial

• Display command-line
• Intro to classes
• Object oriented C#
• Converting types
• Pattern matching
• Use LINQ to query data

What's new

What's new

• What's new in C# 13
• What's new in C# 12
• What's new in C# 11
• What's new in C# 10

Tutorial

• Explore record types
• Explore top level statements
• Explore new patterns
• Write a custom string interpolation handler

Reference

• Breaking changes in the C# compiler
• Version compatibility

Key concepts

Overview

• C# language strategy
• Programming concepts

Concept

• Language Integrated Query (LINQ)
• Asynchronous programming

Advanced concepts

Reference

• Reflection and attributes
• Expression trees
• Native interoperability
• Performance engineering
• .NET Compiler Platform SDK

Stay in touch

Reference

• .NET developer community
• YouTube
• Twitter