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

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API and language reference

Search the .NET API and language reference documentation.

.NET Core API reference

API reference documentation for .NET Core

.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 for Apache Spark API reference

API reference documentation for .NET for Apache Spark

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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