What are different types of directives in .NET?

• @Page:   
  
  It defines page specific attributes used by the ASP.NET page parser and compiler. Can be included only in .aspx files
  

E.g.:

<%@ Page AspCompat="TRUE" language="C#" %>

• @Control:  
  
  It defines control specific attributes used by the ASP.NET page parser and compiler. It can be included only in .ascx files.
  
  E.g.:
  
  <%@ 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.
  
  E.g.:
  
  <% @ Import Namespace="System.web" %>
  
• @Implements:   
  
  This indicates that the current page or user control implements the specified .NET framework interface.
  
  E.g.:
  
  <%@ Implements Interface="System.Web.UI.IPostBackEventHandler" %>
  
• @Register:   
  
  It associates aliases with namespaces and class names for concise notation in custom server control syntax.
  
  E.g.:
  
  <%@ 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.
  
  E.g.:    <%@ 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
  
  E.g.:    <%@ OutputCache Duration="#offseconds"
  
  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.