IT:AD:ASP.NET:Win Forms:Caching
At Page AND WebControl Level, one can use:
<%@OutputCache Duration="60" VaryByParam="none" %>
If you want to cache 99% of the page or control, but vary a piece of it – what they call Donut Caching – then you may want the Substitution control, which renders a string:
<callout icon="true" type="class="header">
<h1>Caching Samples</h1>
<div class="loginstatus">
<asp:Substitution ID="Substitution1" runat="server" MethodName="LoginText" /">
</callout>
</div>