Original author(s)Microsoft
Developer(s).NET Foundation
Initial releaseJune 2010; 14 years ago (2010-06)
Stable release
3.2.7 / November 29, 2018; 5 years ago (2018-11-29)[1]
Preview release
4.0.0-rc1 / November 18, 2015; 8 years ago (2015-11-18)
Written inC#, VB.NET, HTML
Operating systemMicrosoft Windows[2]
TypeWeb application framework
LicenseApache License 2.0[3]
Razor file formats
Filename extension
.razor, .cshtml, .vbhtml
Internet media type
Developed byMicrosoft

Razor is an ASP.NET programming syntax used to create dynamic web pages with the C# or VB.NET programming languages. Razor was in development in June 2010[4] and was released for Microsoft Visual Studio 2010 in January 2011.[5] Razor is a simple-syntax view engine and was released as part of MVC 3 and the WebMatrix tool set.[5]

Razor became a component of AspNetWebStack and then became a part of ASP.NET Core.[6]


The Razor syntax is a template markup syntax, based on the C# programming language, that enables the programmer to use an HTML construction workflow.[clarification needed] Instead of using the ASP.NET Web Forms (.aspx) markup syntax with <%= %> symbols to indicate code blocks, Razor syntax starts code blocks with an @ character and does not require explicit closing of the code-block.

The idea behind Razor is to provide an optimized syntax for HTML generation using a code-focused templating approach, with minimal transition between HTML and code.[7] The design reduces the number of characters and keystrokes, and enables a more fluid coding workflow by not requiring explicitly denoted server blocks within the HTML code.[4] Other advantages that have been noted:[8]

See also


  1. ^ "Microsoft ASP.NET Razor". NuGet.
  2. ^ "Introduction to Razor Pages in ASP.NET Core". learn.microsoft.com.
  3. ^ "Razor/LICENSE.txt at master · aspnet/Razor · GitHub". GitHub. 12 October 2022.
  4. ^ a b "ScottGu's Blog - Introducing "Razor" – a new view engine for ASP.NET". asp.net.
  5. ^ a b "MSDN Blogs". msdn.com. Microsoft. Archived from the original on 2012-07-02. Retrieved 2011-07-08.
  6. ^ Chadwick, Jess (9 September 2011). Programming Razor: Tools for Templates in ASP.NET MVC or WebMatrix. "O'Reilly Media, Inc.". ISBN 978-1-4493-1716-4.
  7. ^ Jon Galloway. "MVC 3 - Razor View Engine". The Official Microsoft ASP.NET Site.
  8. ^ "ASP.NET MVC View Engine Comparison". stackoverflow.com.