Getting Only 1 Value When I Am Returning

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SQL

Windows

C#3.5

WCFServices

public List<customer> login(string salesmanname, string usercode)
{
    List<customer> customers = new List<customer>();
    con.Open();
    using (SqlCommand cmd = new SqlCommand("Select Id, CompanyRefId from SalesMan where salesmanname=@salesmanname and code=@usercode", con))
    {
        cmd.Parameters.AddWithValue("@salesmanname", salesmanname);
        cmd.Parameters.AddWithValue("@usercode", usercode);
        using (SqlDataReader reader = cmd.ExecuteReader())
        {
            while (reader.Read())
            {
                customer c1 = new customer();
                c1.id = (int)reader["Id"];
                c1.companyrefid = (Guid)reader["CompanyRefId"];
                customers.Add(c1);             
            }
            return customers;
        }
    }
}

this is the code i have used but i am getting only id value and not companyrefid while returning in list .how to get both ?.using break point i checked i am getting id value and companyrefrid.
http://www.c-sharpcorner.com/Forums/Thread/257265/getting-only-1-value.aspx[^]please refer this link i am not able to post images here