'''ASP.NET Core''' iswas a [[free and open-source]] [[web framework]] and successor to [[ASP.NET]],<ref>{{Cite web|url=https://docs.microsoft.com/en-us/aspnet/core/fundamentals/choose-aspnet-framework|title=Choose between ASP.NET 4.x and ASP.NET Core|website=docs.microsoft.com}}</ref> developed by [[Microsoft]].<ref>{{cite web|last1=singh Satinder|title=Introduction to ASP.NET Core|url=https://docs.microsoft.com/en-us/aspnet/core/|website=microsoft.com|access-date=10 July 2017}}</ref> It iswas 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 worksworked on .NET Core, dropping support of the .NET Framework.<ref>{{Cite web|url=https://docs.microsoft.com/en-us/aspnet/core/|title=Introduction to ASP.NET Core|website=docs.microsoft.com}}</ref>
The framework iswas 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 doesdid have a high degree of concept compatibility with ASP.NET. The ASP.NET Core framework supportssupported side-by-side versioning so that different applications being developed on a single machine can target different versions of ASP.NET Core. This iswas not possible with previous versions of ASP.NET.
[[Blazor]] iswas 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]] worksworked, the [[legacy system|legacy version]] of it, i.e. "[[Microsoft Edge|Microsoft Edge Legacy]]" and [[Internet Explorer 11]] arewas dropped when you use Blazor.<ref>{{Cite web|title=[Discussion] Updated Blazor browser support for .NET 5 · Issue #26475 · dotnet/aspnetcore|url=https://github.com/dotnet/aspnetcore/issues/26475|access-date=2020-11-11|website=GitHub|language=en}}</ref>
Beginning August 2022 Microsoft reverted back to the [[ASP.NET]] branding.<ref>{{Cite web |title=ASP.NET {{!}} Open-source web framework for .NET |url=https://dotnet.microsoft.com/en-us/apps/aspnet |access-date=2023-06-24 |website=Microsoft |language=en-US}}</ref>
