Code Render Blocks
Code render blocks define inline code or inline expressions that execute when the page is rendered. There are two styles of code render blocks: inline code and inline expressions. Use inline code to define self-contained lines or blocks of code. Use inline expressions as a shortcut for calling the Write method.
<% inline code %>
<%=inline expression %>
Remarks
A compilation error occurs if you try to include the character sequence %> anywhere inside a code render block. That sequence can only be used to close the code render block. For example, the following code will cause an error:
<%@ page language="C#" %>
<%
Response.Write(" %>");
%>
<%@ page language="VB" %>
<%
Response.Write("%>)
%>
To work around this error, you can build a string containing the sequence of characters, as in the following code example:
<%@ page language="C#" %>
<%
String s = "%" + ">";
Response.Write(s);
%>
<%@ page language="VB" %>
<%
Dim s as String
s = "%" & ">"
Response.Write(s)
%>
Note
Unlike Active Server Pages (ASP), in ASP.NET it is invalid to declare a function or subroutine within a code render block (between <% and %> tags).
Example
The following code example shows how you can use the code render blocks to display the same HTML text in a number of different font sizes.
<% for (int i=0; i<10; i++) { %>
<font size="<%=i %>"> Hello World! </font>
<% } %>
<% Dim I as Integer
For I=0 to 9 %>
<font size="<%=i%>"> Hello World! </font>
<% Next %>