private void btn_ReadStringFromBDB_Click(object sender, RoutedEventArgs e)
        {
            var guid = this.tbox_Key.Text;
            var key  = new DatabaseEntry();

            key.Data = Encoding.ASCII.GetBytes(guid);
            KeyValuePair <DatabaseEntry, DatabaseEntry> pair = bdb.Get(key);

            EMessageBox.Show(Encoding.ASCII.GetString(pair.Value.Data));
        }