Microsoft first announced ASP.NET to the public under the codename ASP+, and it is a re-implementation of their Active Server Pages (ASP) technology.[3] ASP.NET is built on the Common Language Runtime (CLR), allowing programmers to write ASP.NET code using any supported .NET language.[4] The ASP.NET SOAP extension framework allows ASP.NET components to process SOAP messages.
ASP.NET supports a number of programming models for building web applications:[6]
ASP.NET Web Forms – A framework for building modular pages out of components, with UI events being processed server-side. This framework is not included in the ASP.NET Core versions; it only works in the "classic" ASP.NET, on Windows.
ASP.NET WebHooks – Implements the Webhook pattern for subscribing to and publishing events via HTTP.
SignalR – A real-time communications framework for bi-directional communication between client and server.
Other ASP.NET extensions include:
ASP.NET Handler – Components that implement the System.Web.IHttpHandler interface. Unlike ASP.NET Pages, they have no HTML-markup file, no events and other supporting. All they have is a code-file (written in any .NET-compatible language) that writes some data to the server HTTP response. HTTP handlers are similar to ISAPI extensions.
ASP.NET AJAX – An extension with both client-side as well as server-side components for writing ASP.NET pages that incorporate Ajax functionality.
On IIS6.0 and lower, pages written using different versions of the ASP framework cannot share session state without the use of third-party libraries. This does not apply to ASP.NET and ASP applications running side by side on IIS7. With IIS7.0, modules may be run in an integrated pipeline that allows modules written in any language to be executed for any request.[9]
Third-party frameworks
It is not essential to use the standard Web forms development model when developing with ASP.NET. Noteworthy frameworks designed for the platform include:
DotNetNuke is an open-source solution that provides both a web application framework and a content management system that allows for advanced extensibility through modules, skins, and providers.
Developers are no longer forced to use Server.CreateObject(...), so early-binding and type safety are possible.
Based on Windows programming; the developer can make use of DLL class libraries and other features of the Web server to build more robust applications that do more than simply rendering HTML (e.g., exception handling)
High DPI Enhancements, UIAutomation Improvements for WPF
November 18, 2015
Unsupported: 5 RC1
This version was later separated from ASP.NET and brought into a new project called ASP.NET Core, whose versioning started at 1.0.[17]
An entirely new project with different development tenets and goals
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Other implementations
The Mono Project supports "everything in .NET 4.7 except WPF, WWF, and with limited WCF and limited ASP.NET async stack."[18] ASP.NET can be run with Mono using one of three options: Apache hosting using the mod_mono module, FastCGI hosting, and XSP.
↑MacDonald, Matthew; Szpuszta, Mario (2005). Pro ASP.NET 2.0 in C# 2005 (1sted.). Apress. pp.5–6. ISBN1-59059-496-7. [...] ASP.NET pages and web services are executed within the CLR (common language runtime), so they can be authored in any language that has a CLR-compliant compiler. [...] ASP.NET gives you the ability to code in any supported .NET language (including Visual Basic, C#, J#, and many other languages that have third-party compilers).
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