Article · Wikipedia archive · Last revised May 30, 2026

ASP.NET Core

ASP.NET Core is an open-source modular web-application framework. It is a redesign of ASP.NET that 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 does have a high degree of concept compatibility with ASP.NET. The ASP.NET Core framework supports 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. ASP.NET Core initially ran on both the Windows-only .NET Framework and the cross-platform .NET. However, support for the .NET Framework was dropped beginning with ASP.Net Core 3.0.

Last revised
May 30, 2026
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≈ 4 min
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Wikipedia ↗
ASP.NET Core
Original authorMicrosoft
Developers.NET Foundation and the open source community
Initial releaseJune 7, 2016 (2016-06-07)
Stable release
10.0.01 Edit this on Wikidata / 11 November 2025 (11 November 2025)
Written inC#
Operating systemWindows, macOS, Linux
PlatformCross-platform
TypeWeb framework
LicenseMIT License2
Websitedotnet.microsoft.com/apps/aspnet
Repository

ASP.NET Core is an open-source modular web-application framework. It is a redesign of ASP.NET that unites the previously separate ASP.NET MVC and ASP.NET Web API into a single programming model.34 Despite being a new framework, built on a new web stack, it does have a high degree of concept compatibility with ASP.NET. The ASP.NET Core framework supports 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. ASP.NET Core initially ran on both the Windows-only .NET Framework and the cross-platform .NET. However, support for the .NET Framework was dropped beginning with ASP.Net Core 3.0.5

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 works, the legacy version of it, i.e. "Microsoft Edge Legacy" and Internet Explorer 11 was dropped when you use Blazor.6

Release history

Version number Release date End of support Supported Visual Studio Version(s)
Unsupported: 1.0 2016-06-27 2019-06-27 Visual Studio 2015, 2017
Unsupported: 1.1 2016-11-18 2019-06-27 Visual Studio 2015, 2017
Unsupported: 2.0 2017-08-14 2018-10-01 Visual Studio 2017
Unsupported: 2.1 long-term support 2018-05-30 2021-08-217rel-note 1rel-note 2 Visual Studio 2017
Unsupported: 2.2 2018-12-048 2019-12-239 Visual Studio 2017 15.9 and 2019 16.0 preview 1
Supported: 2.3 long-term support10rel-note 3 2025-01-1411 2027-04-0712 Visual Studio 2017
Unsupported: 3.0 2019-09-2313 2020-03-039 Visual Studio 2017 and 2019
Unsupported: 3.1 long-term support 2019-12-0314 2022-12-039 Visual Studio 2019
Unsupported: 5.0 2020-11-1015 2022-05-08 Visual Studio 2019 16.8
Unsupported: 6.0 long-term support 2021-11-0816 2024-11-08 Visual Studio 2022
Unsupported: 7.0 standard-term support17 2022-11-0818 2024-05-14 Visual Studio 2022
Supported: 8.0 long-term support19 2023-11-1420 2026-11-10 Visual Studio 2022
Supported: 9.0 standard-term support21 2024-11-1222 2026-11-10 Visual Studio 2022
Latest version: 10.0 long-term support23 2025-11-1124 2028-11-14 Visual Studio 2026
Legend:
Unsupported
Supported
Latest version
Preview version
Future version

Notes:

  1. Supported on .NET Framework until 2025-01-14
  2. Reshipped as ASP.NET Core 2.3
  3. Supported on .NET Framework only

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.25

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) support2627 – 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 lightweight 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
  • Enhanced Security compared to Asp.Net 28

Components

See also

See also

References

References

  1. https://github.com/dotnet/aspnetcore/releases/tag/v10.0.0. {{cite web}}: Missing or empty |title= (help)
  2. "ASP.NET Core license". GitHub. Retrieved 2021-09-29.
  3. "Choose between ASP.NET 4.x and ASP.NET Core". docs.microsoft.com. 10 April 2024.
  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. "GitHub - dotnet/core: Home repository of .NET and .NET Core". October 20, 2019 – via GitHub.
  8. "ASP.NET Blog | Announcing ASP.NET Core 2.2, available today!". ASP.NET Blog. December 4, 2018.
  9. ".NET Core and .NET 5 official support policy". Microsoft. Retrieved 2019-12-06.
  10. "Announcing .NET 10".
  11. https://www.nuget.org/packages/Microsoft.AspNetCore/2.3.0
  12. Roth, Daniel (2026-04-07). "ASP.NET Core 2.3 end of support announcement". .NET Blog. Retrieved 2026-04-07.
  13. "ASP.NET Blog | ASP.NET Core and Blazor updates in .NET Core 3.0". ASP.NET Blog. September 23, 2019.
  14. "ASP.NET Core updates in .NET Core 3.1". ASP.NET Blog. December 3, 2019.
  15. dotnet/aspnetcore, .NET Platform, 2020-11-11, retrieved 2020-11-11
  16. "Announcing ASP.NET Core in .NET 6". .NET Blog. 2021-11-08. Retrieved 2021-11-19.
  17. ".NET and .NET Core Support Policy". Microsoft. Retrieved 2024-10-02.
  18. "Announcing ASP.NET Core in .NET 7". .NET Blog. 2022-11-08. Retrieved 2024-10-02.
  19. ".NET and .NET Core Support Policy". Microsoft. Retrieved November 19, 2023.
  20. "Announcing ASP.NET Core in .NET 8". .NET Blog. 2022-11-08. Retrieved 2023-11-19.
  21. ".NET and .NET Core Support Policy". Microsoft. Retrieved November 12, 2024.
  22. "Announcing NET 9". .NET Blog. 2024-11-12. Retrieved 2024-11-12.
  23. ".NET and .NET Core Support Policy". Microsoft. Retrieved November 12, 2025.
  24. "Announcing NET 9". .NET Blog. 2024-11-12. Retrieved 2025-11-13.
  25. 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.
  26. "OWIN". ASP.NET 0.0.1 documentation. 17 September 2024.
  27. "Roadmap". Github.
  28. "ASP.NET vs ASP.NE CORE". ASP.NET VS. ASP.NET Core: The Ultimate Showdown. 17 February 2024.
External links