ASP.NET Core

ASP.NET Core
Original author(s)	Microsoft
Developer(s)	.NET Foundation and the open source community
Initial release	June 7, 2016; 7 years ago
Stable release	v7.0 / 8 November 2022; 11 months ago
Repository	github.com/dotnet/aspnetcore ;
Written in	C#
Operating system	Windows, macOS, Linux
Platform	Cross-platform
Type	Web framework
License	MIT License
Website	dotnet.microsoft.com/apps/aspnet

ASP.NET Core was a brand briefly used by Microsoft for the rewrite of ASP.NET.^[3]^[4] It was initially a modular framework that runs on both the full .NET Framework, on Windows, and the cross-platform .NET. However, ASP.NET Core version 3 only worked on .NET Core, dropping support of the .NET Framework.^[5]

This complete rewrite of ASP.NET unites the previously separate ASP.NET MVC and ASP.NET Web API into a single programming model.

Despite being a new framework, built on a new web stack, it did have a high degree of concept compatibility with ASP.NET. The ASP.NET Core framework supported side-by-side versioning so that different applications being developed on a single machine can target different versions of ASP.NET Core. This was not possible with previous versions of ASP.NET.

Blazor is a recent (optional) component to support WebAssembly and since version 5.0, it has dropped support for some old web browsers. While current Microsoft Edge worked, the legacy version of it, i.e. "Microsoft Edge Legacy" and Internet Explorer 11 was dropped when you use Blazor.^[6]

Beginning August 2022 Microsoft reverted back to the ASP.NET branding.^[7]

Release history

Version Number	Release Date	End of Support	Supported Visual Studio Version(s)
Old version, no longer maintained: 1.0	2016-06-27	2019-06-27	Visual Studio 2015, 2017
Old version, no longer maintained: 1.1	2016-11-18	2019-06-27	Visual Studio 2015, 2017
Old version, no longer maintained: 2.0	2017-08-14	2018-10-01	Visual Studio 2017
Old version, no longer maintained: 2.1 long-term support	2018-05-30	2021-08-21^[8]	Visual Studio 2017
Old version, no longer maintained: 2.2	2018-12-04^[9]	2019-12-23^[10]	Visual Studio 2017 15.9 and 2019 16.0 preview 1
Old version, no longer maintained: 3.0	2019-09-23^[11]	2020-03-03^[10]	Visual Studio 2017 and 2019
Old version, no longer maintained: 3.1 long-term support	2019-12-03^[12]	2022-12-03^[10]	Visual Studio 2019
Old version, no longer maintained: 5.0	2020-11-10^[13]	2022-05-08	Visual Studio 2019 16.8
Older version, yet still maintained: 6.0 long-term support	2021-11-08^[14]	2024-11-08	Visual Studio 2022
Current stable version: 7.0 standard-term support^[15]	2022-11-08^[16]	2024-05-14	Visual Studio 2022
Legend: Old version Older version, still maintained Latest version Latest preview version Future release

Naming

Originally deemed ASP.NET vNext, the framework was going to be called ASP.NET 5 when ready. However, in order to avoid implying it is an update to the existing ASP.NET framework, Microsoft later changed the name to ASP.NET Core at the 1.0 release.^[17]

Features

No-compile developer experience (i.e. compilation is continuous, so that the developer does not have to invoke the compilation command)
Modular framework distributed as NuGet packages
Cloud-optimized runtime (optimized for the internet)
Host-agnostic via Open Web Interface for .NET (OWIN) support^[18]^[19] – runs in IIS or standalone
A unified story for building web UI and web APIs (i.e. both the same)
A cloud-ready environment-based configuration system
A light-weight and modular HTTP request pipeline
Build and run cross-platform ASP.NET Core apps on Windows, Mac, and Linux
Open-source and community-focused
Side-by-side app versioning when targeting .NET
In-built support for dependency injection

Components

References

^ "Announcing ASP.NET Core in .NET 7". .NET Blog. 2022-11-08. Retrieved 2023-05-06.
^ "ASP.NET Core license". GitHub. Retrieved 2021-09-29.
^ "Choose between ASP.NET 4.x and ASP.NET Core". docs.microsoft.com.
^ singh Satinder. "Introduction to ASP.NET Core". microsoft.com. Retrieved 10 July 2017.
^ "Introduction to ASP.NET Core". docs.microsoft.com.
^ "[Discussion] Updated Blazor browser support for .NET 5 · Issue #26475 · dotnet/aspnetcore". GitHub. Retrieved 2020-11-11.
^ "ASP.NET | Open-source web framework for .NET". Microsoft. Retrieved 2023-06-24.
^ "GitHub - dotnet/core: Home repository of .NET and .NET Core". October 20, 2019 – via GitHub.
^ "ASP.NET Blog | Announcing ASP.NET Core 2.2, available today!". ASP.NET Blog. December 4, 2018.
^ ^a ^b ^c ".NET Core and .NET 5 official support policy". Microsoft. Retrieved 2019-12-06.
^ "ASP.NET Blog | ASP.NET Core and Blazor updates in .NET Core 3.0". ASP.NET Blog. September 23, 2019.
^ "ASP.NET Core updates in .NET Core 3.1". ASP.NET Blog. December 3, 2019.
^ dotnet/aspnetcore, .NET Platform, 2020-11-11, retrieved 2020-11-11
^ "Announcing ASP.NET Core in .NET 6". .NET Blog. 2021-11-08. Retrieved 2021-11-19.
^ ".NET and .NET Core Support Policy". Microsoft. Retrieved December 30, 2022.
^ "Announcing ASP.NET Core in .NET 7". .NET Blog. 2022-11-08. Retrieved 2022-11-08.
^ Jeffrey T. Fritz. "ASP.NET 6 is dead - Introducing ASP.NET Core 1.0 and .NET Core 1.0". .NET Web Development and Tools Blog. Retrieved 20 January 2016.
^ "OWIN". ASP.NET 0.0.1 documentation.
^ "Roadmap". Github.

External links

Official website
ASP.NET on GitHub
Announcing ASP.NET Core 2.1 RC [1]

[1] "Announcing ASP.NET Core in .NET 7". .NET Blog. 2022-11-08. Retrieved 2023-05-06.

[GHlicense-2] "ASP.NET Core license". GitHub. Retrieved 2021-09-29.

[3] "Choose between ASP.NET 4.x and ASP.NET Core". docs.microsoft.com.

[4] singh Satinder. "Introduction to ASP.NET Core". microsoft.com. Retrieved 10 July 2017.

[5] "Introduction to ASP.NET Core". docs.microsoft.com.

[6] "[Discussion] Updated Blazor browser support for .NET 5 · Issue #26475 · dotnet/aspnetcore". GitHub. Retrieved 2020-11-11.

[7] "ASP.NET | Open-source web framework for .NET". Microsoft. Retrieved 2023-06-24.

[8] "GitHub - dotnet/core: Home repository of .NET and .NET Core". October 20, 2019 – via GitHub.

[9] "ASP.NET Blog | Announcing ASP.NET Core 2.2, available today!". ASP.NET Blog. December 4, 2018.

[:0-10] ".NET Core and .NET 5 official support policy". Microsoft. Retrieved 2019-12-06.

[11] "ASP.NET Blog | ASP.NET Core and Blazor updates in .NET Core 3.0". ASP.NET Blog. September 23, 2019.

[12] "ASP.NET Core updates in .NET Core 3.1". ASP.NET Blog. December 3, 2019.

[5.0-13] dotnet/aspnetcore, .NET Platform, 2020-11-11, retrieved 2020-11-11

[14] "Announcing ASP.NET Core in .NET 6". .NET Blog. 2021-11-08. Retrieved 2021-11-19.

[15] ".NET and .NET Core Support Policy". Microsoft. Retrieved December 30, 2022.

[16] "Announcing ASP.NET Core in .NET 7". .NET Blog. 2022-11-08. Retrieved 2022-11-08.

[17] Jeffrey T. Fritz. "ASP.NET 6 is dead - Introducing ASP.NET Core 1.0 and .NET Core 1.0". .NET Web Development and Tools Blog. Retrieved 20 January 2016.

[18] "OWIN". ASP.NET 0.0.1 documentation.

[19] "Roadmap". Github.

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