SQL DataReader network usage limit

I have such an idea (don't know bad or good). I have utility, which connects by reglament to SQL server and fetches some data to application. Data is simple (2 varchar text attributes), but count of data is ~ 3 millions rows. So, my application uses network very intensively. Can I programmatically decrease (limit, throttling, etc...) the network bandwidth usage by SQL DataReader? Let it work more slowly, but not stress nither server nor client. Is this idea good? If not, what I have to do so?

Here is code, so far:

using (SqlConnection con = new SqlConnection("My connection string here"))
{
    con.Open();
    using (SqlCommand command = new SqlCommand(query, con))
    {                        
        using (SqlDataReader reader = command.ExecuteReader())
        {
            while (reader.Read())
            {
                yield return new MyDBObject()
                {                               
                    Date = (DateTime)reader["close_date"],                                
                    JsonResult = (string)reader["json_result"]
                };
            }
        }
    }
}