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.

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.