ASP.NET Razor view engine

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Developer(s) Microsoft
Initial release January 2010
Stable release ASP.NET MVC 4 / 15 August 2012; 3 years ago (2012-08-15)
Written in C#, VB.NET, HTML
Operating system Microsoft Windows
Type Web application framework
License Apache 2.0[1]
Website The Official Microsoft ASP.NET Site
Razor View Engine File Format
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[2] and was released for Microsoft Visual Studio 2010 in January 2011.[3] Razor is a simple-syntax view engine and was released as part of ASP.NET MVC 3 and the Microsoft WebMatrix tool set.[3]


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 .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.[4] 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.[2] Other advantages that have been noted:[5]

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


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

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