Fetch Count of Records from multiple tables and display in Label using DataReader in ASP.Net

Hi

I use below code in SP to count row of table and show it in label

ALTER procedure [dbo].[showMessage]

as
begin
SET NOCOUNT ON

select (select COUNT(id) from Message) as Message
,(select COUNT(id) from MessageM) as Messagem
end

AND BEhind Code

      SqlCommand _cmd = new SqlCommand("showMessage", _cn);
        _cmd.CommandType = CommandType.StoredProcedure;

        _cn.Open();
        SqlDataReader _dr = _cmd.ExecuteReader();
        while (_dr.Read())
        {

            LblNRM.Text = _dr["Message"].ToString();
            LblRM.Text = _dr["MessageM"].ToString();
            }
_cn.close()

Now I want define other label that shows total of these two table rows

I mean if in Message Table has 7 row and MessageM tabel has 8 row so

LblNMR =7  and LblRM =8

Now I want define LBLMAIN that in this label show LBLMAIN=15 total of 2 tabel Rows

How I can do it ?

Thanks alot