oints</b> are
categorized into three types: Core, Client and Gui. Each of these types is
supported by a different <b>Extension Host</b>.

<p>An NUnit <b>Addin</b> provides enhanced functionality through one or more
extensions, which it installs at identified <b>Extension Points</b>. Each
<b>Addin</b> is characterized by the types of extensions it supplies, so that
an <b>Extension Host</b> knows whether to invoke it.</p>

<blockquote>
<p><b>Note:</b> In the current Beta release, only Core extensions are actu