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Developer(s) Microsoft
Initial release June 2010; 8 years ago (2010-06)
Stable release
3.2.3 / February 9, 2015; 3 years ago (2015-02-09)[1]
Preview release
4.0.0-rc1 / November 18, 2015; 2 years ago (2015-11-18)
Written in C#, VB.NET, HTML
Operating system Microsoft Windows
Type Web application framework
License Apache 2.0[2]
Razor File Formats
Filename extension .cshtml, .vbhtml
Internet media type text/html
Developed by Microsoft

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


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 a @ 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.[5] 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.[3] Other advantages that have been noted:[6]

  • Supports IntelliSense (statement completion support)
  • Unit Testable
  • Supports "layouts" (an alternative to the "master page" concept in classic Web Forms (.aspx) pages)


  1. ^ "Microsoft ASP.NET Razor". NuGet.
  2. ^ "Razor/LICENSE.txt at dev · aspnet/Razor · GitHub". GitHub.
  3. ^ a b "ScottGu's Blog - Introducing "Razor" – a new view engine for ASP.NET".
  4. ^ a b "MSDN Blogs". Microsoft.
  5. ^ Jon Galloway. "MVC 3 - Razor View Engine". The Official Microsoft ASP.NET Site.
  6. ^ "ASP.NET MVC View Engine Comparison".

External links