ASP PAGE STRUCTURE-CODE DECLARATION BLOCKS

Code Declaration Blocks

• A code declaration block contains all the application logic for  ASP.NET page and all the global variable declarations, subroutines, and functions.
•  It must appear within a <Script Runat="Server"> tag.
• We can declare subroutines and functions only within a code declaration block.
•  We receive an error if we attempt to define a function or subroutine in any other section of an ASP.NET page.
• The <Script Runat="Server"> tag accepts two optional attributes. 
• First, We can specify the programming language to use within the <Script> tag by including a language attribute like this:

<Script Language="C#" Runat="Server">

• If we don't specify a language, the language defaults to the one defined by the <%@ Page Language %> directive .
•  If no language is specified in a page, the language defaults to Visual Basic.
• The second optional attribute of the <Script Runat="Server"> tag is SRC. 
• We can use it to specify an external file that contains the contents of the code block. 

<Script Runat="Server" SRC="ApplicationLogic.aspx"/>