Server tags reference

<% %> An embedded code block is server code that executes during the page's render phase. The code in the block can execute programming statements and call functions in the current page class.

<%= %> most useful for displaying single pieces of information.

CANNOT be used to assign values to properties (ie Text='<%= GetSomeText() %>' - this won't work) See here for an alternative.

<%# %> Data Binding Expression Syntax.

<%$ %> ASP.NET Expression.

<%@ %> Directive Syntax.

<%-- --%> Server-Side Comments.