problem med app_code funktion

Hej Eksperten!

Jeg en problem med at få data fra en funktion son ligger i App_code.
Min cs file i App_code ser sådan her ud:

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public class addconstring
{

    public void GetString(Int id, String name)
    {

        SqlConnection myConnection  = new SqlConnection(ConfigurationManager.ConnectionStrings["dbconnect"].ConnectionString);

        SqlCommand command = new SqlCommand("select_user", myConnection);
        command.CommandType = CommandType.StoredProcedure;
        command.Parameters.Add("@id", SqlDbType.Int);
        command.Parameters.Add("@name", SqlDbType.VarChar);
        command.Parameters["@id"].Value = @id;
        command.Parameters["@name"].Value = @name;
        command.Connection.Open();

        SqlDataReader reader = command.ExecuteReader(CommandBehavior.CloseConnection);

        while (reader.Read())
        {
            string sendme = "User id " + reader["user_id"].ToString() + "<br />";
            sendme = sendme + "User Name " + reader["user_name"].ToString() + "<br />";
            sendme = sendme + "User password " + reader["password"].ToString() + "<br />";
            sendme = sendme + "User status " + reader["status"].ToString() + "<br />";
        }
       
        reader.Close();

        Return sendme;
   
    }
}

og mit funktions kald ser sådan her ud :

protected void Page_Load(object sender, EventArgs e)
    {
        addconstring conn = new addconstring();

        Response.Write(conn.GetString(12,tim));

     

    }