Assembly: System.Web (in System.Web.dll)
HTML-encoding values can help prevent cross-site scripting attacks and malicious content from being displayed. HTML encoding is also useful when you want to display HTML code in the browser, such as displaying the string "<br/>" instead of inserting a line break (<br/> element) in the page.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.