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What is .NET Standard?


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.

Specification

The .NET Standard specification is a standardized set of APIs. The specification is maintained by .NET implementors, specifically Microsoft (includes .NET Framework, .NET Core, and Mono) and Unity. A public feedback process is used as part of establishing new .NET Standard versions through GitHub.

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.

.NET Standard provides the following features:

  • .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 is implemented by .NET Framework, .NET Core, and Xamarin. For .NET Core, this added 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.
  • You can see the .NET Standard API definition in the dotnet/standard repo on GitHub. If you want to know more about .NET Standard you can check out the FAQ on GitHub.

Summary: I this article we have learned about .NET Standard and it's characteristics to define .NET Standard. This question is very common in ASP NET CORE Interview. Read more interview questions of aspnetcore here.

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Anil Sharma is Chief Editor of dotnet-stuff.com. He's a software professional and loves to work with Microsoft .Net. He's usually writes articles about .Net related technologies and here to shares his experiences, personal notes, Tutorials, Examples, Problems & Solutions, Code Snippets, Reference Manual and Resources with C#, Asp.Net, Linq , Ajax, MVC, Entity Framework, WCF, SQL Server, jQuery, Visual Studio and much more...!!!

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