System.Byte in datagrid column
===

my query:

    string query = @"SELECT r.id, user_name, user_phone, date_create, REPLACE( date_payment,  '0000-00-00 00:00:00',  'Не оплачено' ) as 
                    date_payment, payment_method, amount, rs.name_ru
                    FROM request AS r, request_status AS rs
                    WHERE r.status = rs.id";

so binding:

    DataTemplate>
        <TextBlock VerticalAlignment="Center" Text="{Binding date_payment}" Width="135" />
    </DataTemplate>
then column `date_payment` value = `System.Byte[]`, other data is OK

please help!!!