Comments

<%-- This is a comment --%>
<%-- This is a
multi-line comment --%>

Page directives

<%@ Page Title="Products" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true"  CodeBehind="ProductList.aspx.cs" Inherits="WingtipToys.ProductList" %>

Directive tag

<%: Page.Title %>
<a href="ProductDetails.aspx?productID=<%#:Item.ProductID%>">
<span>
	<%#:Item.ProductName%>
</span>

Highlighted C# inside scripts

This requires the C# component to be loaded. On this page, check C# before checking ASP.NET should make the example below work properly.

<script runat="server">
	// The following variables are visible to all procedures
	// within the script block.
	String str;
	int i;
	int i2;

	int DoubleIt(int inpt)
	{
		// The following variable is visible only within
		// the DoubleIt procedure.
		int factor = 2;

		return inpt * factor;
	}
</script>