.NET documentation

Learn to use .NET to create applications on any platform using C#, F#, and Visual Basic. Browse API reference, sample code, tutorials, and more.

Download

Download .NET

Training

Build .NET apps with C#

Training

Create your first web app

Get started

Interactive introduction to C#

Architecture

.NET architecture docs

Overview

Azure for .NET developers

Overview

.NET Aspire

What's new

What's new in .NET

.NET: Free. Cross platform. Open source.

A developer platform for building all your apps: web, mobile, desktop, gaming, IoT, and more. Supported on Windows, Linux, and macOS.

Open source .NET

• .NET overview
• .NET tutorials
• What's new in .NET 9
• .NET Foundation
• .NET developer community
• Community Toolkits

.NET concepts

• What is .NET?
• .NET fundamentals
• .NET implementations
• .NET Framework (for Windows)
• .NET Standard
• .NET Q&A
• .NET tech community forums
• Security in .NET

Develop .NET apps

• Create .NET desktop apps for Windows
• Create web apps with ASP.NET Core
• Build cloud-native .NET apps with Orleans
• Build cloud-native apps with .NET Aspire
• Containerize .NET apps with Docker

.NET tools and diagnostics

• .NET SDK overview
• .NET CLI overview
• MSBuild property reference
• Global and local tools
• Diagnostics tools
• Code analysis
• Package validation

Migrate and upgrade

• Port from .NET Framework to .NET
• .NET breaking changes
• Download .NET

DevOps and testing

• Deploy .NET apps
• Unit test .NET apps
• GitHub Actions and .NET

Data access in .NET

• LINQ overview
• Entity Framework Core
• Azure Storage
• XML data

Advanced .NET programming

• Async programming patterns overview
• Threading overview
• Parallel programming overview
• Native interoperability
• Garbage collection

Programming languages

Write your app in your favorite language

Write .NET apps in C#, F#, or Visual Basic

A modern, object-oriented, and type-safe language

A simple language for succinct, robust, and performant code

An approachable language with readable syntax

Create your application

You can choose web, mobile, desktop, gaming, IoT, and more.

Web

• ASP.NET Core tutorials
• What is ASP.NET Core?
• ASP.NET Core in Visual Studio
• ASP.NET MVC apps in Windows containers
• Blazor: Interactive client-side web UI with .NET
• F# for web development

Mobile

• .NET Multi-platform App UI (.NET MAUI)
• Xamarin.Forms
• Xamarin.iOS
• Xamarin.Android
• Develop Xamarin apps with Azure

Desktop

• Universal Windows apps
• Windows Presentation Foundation (.NET 5+)
• Windows Presentation Foundation (.NET Framework)
• Windows Forms (.NET 5+)
• Windows Forms (.NET Framework)
• .NET Multi-platform App UI (.NET MAUI)
• Xamarin for macOS

Microservices

• Dapr for .NET developers
• Cloud native .NET apps
• Serverless apps with Azure
• Architecture for containerized .NET apps
• Deploy a Worker Service to Azure

Cloud

• Azure for .NET developers
• .NET Aspire
• Migrate on-premises .NET web apps or services
• Azure services for .NET developers
• Azure SDK for .NET
• Deploying Azure Resources with F#

AI and machine learning

• AI for .NET developers
• Build a chat app
• Understand prompt engineering
• Implement RAG using vector search
• Get started with the .NET enterprise chat sample
• Build custom AI solutions with ML.NET
• Azure Cognitive Services
• Azure machine learning
• F# for Machine Leaning

Game development

• Game development with Visual Studio
• Learn how to use CRYENGINE to build games with C#
• Build games with C# using the MonoGame library
• Learn how to use Unity to build 2D and 3D games with C#

Internet of things (IoT)

• .NET IoT Libraries
• Get started in 5 minutes
• Blink an LED
• .NET IoT 101 video series

API and language reference

Search the .NET API and language reference documentation.

.NET API reference

API reference documentation for .NET

.NET Framework API reference

API reference documentation for .NET Framework

ASP.NET Core API reference

API reference documentation for ASP.NET Core

ML.NET API reference

API reference documentation for ML.NET

.NET Package-provided API reference

Reference documentation for package-provided .NET APIs

C# language reference

C# language reference and specification

F# language reference

F# language reference

Visual Basic language reference

Visual Basic language reference and specification

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