p_Open.htm">Open(String, String)</a> method.  If this parameter is null, then
            the target must be specified to the <a href="M_BerkeleyDB_IBackup_Open.htm">Open(String, String)</a>
            method.
            <p>
            This directory, and any required subdirectories, will be created for
            you if you specify <a href="T_BerkeleyDB_CreatePolicy.htm">IF_NEEDED</a> or 
            <a href="T_BerkeleyDB_CreatePolicy.htm">ALWAYS</a> for the 
            <a href="F_BerkeleyDB_BackupOpt