/// <summary>
    /// Loads current sites from DB.
    /// </summary>
    private void GetCurrentSites()
    {
        DataSet serverSites = SMTPServerSiteInfoProvider.GetSMTPServerSites().WhereEquals("ServerID", smtpServer.ServerID).OrderBy("SiteID");

        if (!DataHelper.DataSourceIsEmpty(serverSites))
        {
            currentValues = TextHelper.Join(";", DataHelper.GetStringValues(serverSites.Tables[0], "SiteID"));
        }
        else
        {
            currentValues = string.Empty;
        }
    }
    /// <summary>
    /// Loads current sites from DB.
    /// </summary>
    private void GetCurrentSites()
    {
        string where = string.Format("ServerID = {0}", smtpServer.ServerID);
        serverSites  = SMTPServerSiteInfoProvider.GetSMTPServerSites(where, "SiteID");

        if (!DataHelper.DataSourceIsEmpty(serverSites))
        {
            currentValues = TextHelper.Join(";", SystemDataHelper.GetStringValues(serverSites.Tables[0], "SiteID"));
        }
        else
        {
            currentValues = string.Empty;
        }
    }