.NET fundamentals documentation

Learn the fundamentals of .NET, an open-source developer platform for building many different types of applications.

Learn about .NET

Download

• Download .NET

Overview

• What is .NET?
• Introduction to .NET
• .NET languages

Concept

• .NET Standard
• Common Language Runtime (CLR)
• .NET Core support policy

What's new

• What's new in .NET 10
• What's new in .NET 9
• What's new in .NET 8
• What's new in .NET 7
• What's new in .NET 6

Install .NET

Overview

• Select which .NET version to use

How-To Guide

• Install .NET SDK
• Install .NET runtime
• Use a Linux package manager to install
• Check installed versions

Reference

• .NET SDK and runtime dependencies

Get started with .NET

Get started

• Get started with .NET
• Get started with ASP.NET Core
• .NET on Q&A
• .NET tech community forums

video

• Tutorial: Hello World in 10 minutes

Tutorial

• Create a Hello World app in Visual Studio Code
• Create a Hello World app in Visual Studio
• Containerize a .NET Core app

Concept

• Port from .NET Framework to .NET

Deploy

• App publishing
• Publish .NET apps with GitHub Actions

Serialize data

Concept

• Serialize and deserialize JSON

How-To Guide

• Serialize and deserialize JSON using C#
• Migrate from Newtonsoft.Json to System.Text.Json
• Write custom converters for JSON serialization

sample

• Examples of XML serialization

Runtime libraries

Overview

• Runtime libraries overview

Concept

• Dependency injection in .NET
• Configuration in .NET
• Logging in .NET
• .NET generic host
• Worker services in .NET
• Caching in .NET
• HTTP in .NET
• Localization in .NET
• File globbing in .NET

Tutorial

• Implement a custom configuration provider
• Compile-time logging source generation
• Create a Windows Service using BackgroundService

Format and convert dates, numbers, and strings

Concept

• Numeric format strings
• Date and time format strings
• Composite formatting
• Convert times between time zones
• Trim and remove characters from strings
• Regular expressions in .NET

How-To Guide

• Convert strings to DateTime
• Pad a number with leading zeros
• Display milliseconds in date and time values

Reference

• Regular expression language

Use events and exceptions

Concept

• Best practices for exceptions
• Handle and raise events

How-To Guide

• Use a try-catch block to catch exceptions
• Raise and consume events

File and stream I/O

Concept

• File and stream I/O
• File path formats on Windows

How-To Guide

• Write text to a file
• Read text from a file
• Compress and extract files
• Open and append to a log file