>
            A NotFoundException is thrown if <span class="parameter">key</span> is not in
            the database. 
            </td></tr><tr><td><a href="T_BerkeleyDB_KeyEmptyException.htm">BerkeleyDB<span class="languageSpecificText"><span class="cs">.</span><span class="vb">.</span><span class="cpp">::</span><span class="nu">.</span></span>KeyEmptyException</a></td><td>
            A KeyEmptyException is thrown if the database is a
            <a href="T_BerkeleyDB_QueueDatabase.htm">QueueDatabase</a>