What are various types of directives in .NET?

• @Page:
  
  Defines page-specific attributes used by the ASP.NET page parser and compiler. Can be included only in .aspx files <%@ Page AspCompat="TRUE" language="C#" %>
  
  
• @Control:
  
  Defines control-specific attributes used by the ASP.NET page parser and compiler. Can be included only in .ascx files. <%@ Control Language="VB" EnableViewState="false" %>
  
  
• @Import:
  
  Explicitly imports a namespace into a page or user control. The Import directive cannot have more than one namespace attribute. To import multiple namespaces, use multiple @Import directives. <% @ Import Namespace="System.web" %>
  
  
• @Implements:
  
  Indicates that the current page or user control implements the specified .NET framework interface.<%@ Implements Interface="System.Web.UI.IPostBackEventHandler" %>
  
  
• @Register:
  
  Associates aliases with namespaces and class names for concise notation in custom server control syntax.<%@ Register Tagprefix="Acme" Tagname="AdRotator" src="AdRotator.ascx" %>
  
  
• @Assembly:
  
  Links an assembly to the current page during compilation, making all the assembly's classes and interfaces available for use on the page. <%@ Assembly Name="MyAssembly" %><%@ Assembly src="MySource.vb" %>
  
  
• @OutputCache:
  
  Declaratively controls the output caching policies of an ASP.NET page or a user control contained in a page<%@ OutputCache Duration="#ofseconds" Location="Any | Client | Downstream | Server | None" Shared="True | False" VaryByControl="controlname"VaryByCustom="browser | customstring" VaryByHeader="headers" VaryByParam="parametername" %>
  
  
• @Reference:
  
  Declaratively indicates that another user control or page source file should be dynamically compiled and linked against the page in which this directive is declared.