.NET

As explained in F# in Action: A Revised Edition of Get Programming with F#

.NET is a software development platform that provides runtimes, libraries, and tools for building applications in multiple programming languages.

.NET is a free, open-source, cross-platform runtime and application platform for building software with languages such as F#, C#, and Visual Basic .NET. It runs on Windows, macOS, and Linux, supports cloud and desktop applications, and provides libraries for files, memory management, web development, databases, and more. section 2.2 section 1.5.7

The platform combines practical application development with a mature ecosystem:

• Reuse ready-made functionality from .NET libraries, C# packages, and more than 200,000 NuGet packages. section 2.2
• Mix F# and object-oriented .NET styles, consuming or creating classes, interfaces, properties, methods, and assemblies. section 2.2
• Target backend services with ASP.NET Core, browsers through Fable, mobile devices through Xamarin or MAUI, and cloud platforms including Azure and AWS. section 1.5.7

Using .NET from F#

F# code can call .NET functionality such as System.DateTime.UtcNow while retaining F#'s concise syntax. Existing .NET knowledge and C# documentation remain useful, and F# and C# can participate in hybrid solutions. section 1.1 section 2.2

Figure 2.1 A simplified view of the .NET language and runtime landscape

Use the landscape figure to see how .NET languages and the runtime fit together in one application. section 2.2

How F# in Action: A Revised Edition of Get Programming with F# covers it

How deep it goes

Explains runtime capabilities, interoperability, targets, packages, and installation, but does not detail runtime internals.

Examples

Uses F# interoperability, System.DateTime, NuGet packages, ASP.NET Core services, browser applications, mobile targets, and SDK installation.

What you can do after

Build applications with F#, C#, or Visual Basic .NET and reuse platform libraries, packages, and interoperable components.

How it connects

Connects F#, C#, Visual Basic .NET, the CLR, NuGet, ASP.NET Core, Fable, Xamarin, MAUI, Azure, and AWS.

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Also explained in

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  ASP.NET Core in Action, 3e.NET 5+ is the unified generation of the .NET platform comprising .NET 5, .NET 6, and later releases.
• 

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  .NET in Action, Second Edition.NET is a free, cross-platform, open-source software platform whose runtime executes code compiled to Common Intermediate Language.
• 

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  Building Web APIs with ASP.NET Core.NET is Microsoft's cross-platform software development platform for building and running applications and services.
• 

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  .NET MAUI in Action.NET 7 is a major release of Microsoft's .NET software development platform and runtime.

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Related concepts

• Common Language Runtimehas part · The Common Language Runtime is .NET’s managed execution environment for loading and running managed code and providing services such as memory management and garbage collection.
• ASP.NET Coreused by · ASP.NET Core is Microsoft’s cross-platform, open-source framework for building web applications and services on the .NET platform.
• Pythonalternative to · Python is a high-level, general-purpose, dynamically typed programming language known for readable syntax and automatic memory management.
• .NET SDKhas part · .NET SDK is Microsoft's software development kit providing tools, compilers, libraries, commands, and templates for building, testing, and publishing .NET applications.
• F#used by · F# is a statically typed, functional-first, multiparadigm programming language in the .NET ecosystem.
• .NET Frameworkalternative to · .NET Framework is Microsoft's Windows-focused managed software framework and runtime for building and running .NET applications.

This explainer was generated by Manning's knowledge graph from the text of F# in Action: A Revised Edition of Get Programming with F#. The section links point to the parts of the book it draws on.