|Developer(s)||.NET Foundation and the open source community|
|Operating system||Windows, macOS, Linux|
|License||Apache License 2.0|
ASP.NET Core is a free and open-source web framework and successor to ASP.NET, developed by Microsoft. It is a modular framework that runs on both the full .NET Framework, on Windows, and the cross-platform .NET Core. However ASP.NET Core version 3 works only on .NET Core dropping support of .NET Framework.
The framework is a complete rewrite 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. ASP.NET Core applications supports side by side versioning in which different applications, running on the same machine, can target different versions of ASP.NET Core. This is not possible with previous versions of ASP.NET.
Blazor is a recent (optional) component to support WebAssembly and since version 5.0 it is dropping 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 are dropped when you use Blazor.
|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|Old version, no longer maintained: 1.0||2016-06-27||2019-06-27||Visual Studio 2015, 2017|
|Old version, no longer maintained: 1.1||2016-11-18||2019-06-27||Visual Studio 2015, 2017|
|Old version, no longer maintained: 2.0||2017-08-14||2018-10-01||Visual Studio 2017|
|Older version, yet still maintained: 2.1 long-term support||2018-05-30||2021-08-21||Visual Studio 2017|
|Old version, no longer maintained: 2.2||2018-12-04||2019-12-23||Visual Studio 2017 15.9 and 2019 16.0 preview 1|
|Old version, no longer maintained: 3.0||2019-09-23||2020-03-03||Visual Studio 2017 and 2019|
|Older version, yet still maintained: 3.1 long-term support||2019-12-03||2022-12-03||Visual Studio 2019|
|Current stable version: 5.0||2020-11-10||Visual Studio 2019 16.8|
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.
Edited: 2021-06-18 19:49:04