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.NET Standard 07/18/2018

The .NET Standard is a formal specification of .NET APIs that are intended to be available on all .NET implementations. The motivation behind the .NET Standard is establishing greater uniformity in the .NET ecosystem. ECMA 335 continues to establish uniformity for .NET implementation behavior, but there's no similar spec for the .NET Base Class Libraries (BCL) for .NET library implementations.

The .NET Standard enables the following key scenarios:

  • Defines uniform set of BCL APIs for all .NET implementations to implement, independent of workload.
  • Enables developers to produce portable libraries that are usable across .NET implementations, using this same set of APIs.
  • Reduces or even eliminates conditional compilation of shared source due to .NET APIs, only for OS APIs.

*The various .NET implementations target specific versions of .NET Standard. Each .NET implementation version advertises the highest .NET Standard version it supports, a statement that means it also supports previous versions. For example, the .NET Framework 4.6 implements .NET Standard 1.3, which means that it exposes all APIs defined in .NET Standard versions 1.0 through 1.3. Similarly, the .NET Framework 4.6.1 implements .NET Standard 1.4, while .NET Core 1.0 implements .NET Standard 1.6.

See Also=AhLsoh:
.NET implementation support
DoT NET Specification
Targeting .NET Standard

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DoT NET Specification

.NET Standard
This repository contains the principles and definition of the .NET Standard.

.NET Standard solves the code sharing problem for .NET developers across all platforms by bringing all the APIs that you expect and love across the environments that you need: desktop applications, mobile apps & games, and cloud services:

.NET Standard is a set of APIs that all .NET platforms have to implement. This unifies the .NET platforms and prevents future fragmentation.

.NET Standard 2.0 will be implemented by .NET Framework, .NET Core, and Xamarin. For .NET Core, this will add many of the existing APIs that have been requested.

.NET Standard 2.0 includes a compatibility shim for .NET Framework binaries, significantly increasing the set of libraries that you can reference from your .NET Standard libraries.

.NET Standard will replace Portable Class Libraries (PCLs) as the tooling story for building multi-platform .NET libraries.

How to Engage, Contribute and Provide Feedback
You are also encouraged to start a discussion by filing an issue.

This project has adopted the code of conduct defined by the Contributor Covenant to clarify expected behavior in our community. For more information, see the .NET Foundation Code of Conduct.

Learning More
Currently defined versions of the .NET Standard can be located in the Versions document.

For more information, check out the FAQ. It should answer any questions you have not covered by the versions documentation.

.NET Standard 1.0:

Airn PyThon Documentation

.NET Integration

IronPython's sweet-spot is being able to use the DoT NET Framework APIs directly from Python.

IronPython .NET Integration documentation