How to insert data to a database table from a generic list

private void button1_Click(object sender, EventArgs e)
        {
            int codSchool = 7;
            List<AlumnosModel> people = new List<AlumnosModel>();

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(@"http://rarg.org/Services/students.svc/People/"+codSchool);
            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
            using (Stream stream = response.GetResponseStream())
            using (StreamReader reader = new StreamReader(stream))
            {
                var json = reader.ReadToEnd();
                people = JsonConvert.DeserializeObject<List<AlumnosModel>>(json);
            }
            dataGridView1.DataSource = people;
        }

private void button1_Click(object sender, EventArgs e)
        {
            int codSchool = 7;
            List<AlumnosModel> people = new List<AlumnosModel>();

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(@"http://rarg.org/Services/students.svc/People/"+codSchool);
            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
            using (Stream stream = response.GetResponseStream())
            using (StreamReader reader = new StreamReader(stream))
            {
                var json = reader.ReadToEnd();
                people = JsonConvert.DeserializeObject<List<AlumnosModel>>(json);
            }
            dataGridView1.DataSource = people;
        }