ASP.NET Core
Open-source web application framework
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.
Blazor is a recent, optional component that supports WebAssembly. Since version 5.0, Blazor has dropped support for some older web browsers, including Microsoft Edge Legacy and Internet Explorer 11.
01Release 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 | 2021-08-21 | Visual Studio 2017 |
| Unsupported: 2.2 | 2018-12-04 | 2019-12-23 | Visual Studio 2017 15.9 and 2019 16.0 preview 1 |
| Supported: 2.3 long-term support | 2025-01-14 | 2027-04-07 | Visual Studio 2017 |
| Unsupported: 3.0 | 2019-09-23 | 2020-03-03 | Visual Studio 2017 and 2019 |
| Unsupported: 3.1 long-term support | 2019-12-03 | 2022-12-03 | Visual Studio 2019 |
| Unsupported: 5.0 | 2020-11-10 | 2022-05-08 | Visual Studio 2019 16.8 |
| Unsupported: 6.0 long-term support | 2021-11-08 | 2024-11-08 | Visual Studio 2022 |
| Unsupported: 7.0 standard-term support | 2022-11-08 | 2024-05-14 | Visual Studio 2022 |
| Supported: 8.0 long-term support | 2023-11-14 | 2026-11-10 | Visual Studio 2022 |
| Supported: 9.0 standard-term support | 2024-11-12 | 2026-11-10 | Visual Studio 2022 |
| Latest version: 10.0 long-term support | 2025-11-11 | 2028-11-14 | Visual Studio 2026 |
| Legend: Unsupported Supported Latest version Preview version Future version | |||
Notes:
02Naming
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.
03Features
- 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, 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
04Components
- Entity Framework (EF) Core
- Identity Core
- MVC Core
- Razor Core
- SignalR
- Blazor
- Kestrel web server
Sources and credits
This article is adapted from the Wikipedia article “ASP.NET Core”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.
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