//main method
          var grab = new MBRetrieval();
            grab.RetrieveStudents();

            var demographic = new Dem();
            demographic.CreateDemFile();



//snippet 2 (populating the list)



public class MBRetrieval
    {
        public List<Student> studentList = new List<Student>();
        public async Task<string> CallRestMethod(string url)
        {
            HttpClient client = new HttpClient();
            client.BaseAddress = new Uri(url);
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            client.DefaultRequestHeaders.Add("auth-token", "x");
            HttpResponseMessage response = client.GetAsync(url).Result;
            return await response.Content.ReadAsStringAsync();
        }

        public async void RetrieveStudents()
        {
            var allStudentsParent = new List<MbStudent>();

            for (var i = 1; i <= 4; i++)
            {
                string url = $"https://x/v2/students?per_page=200&page={i}";
                var json = await CallRestMethod(url);
                var result = JsonSerializer.Deserialize<MbStudent>(json);
                allStudentsParent.Add(result);
            }


            foreach (var root in allStudentsParent)
            {
                foreach (var student in root.Students)
                {
                    studentList.Add(student);
                }
            }
        }

    }


//snippet 3

 public void CreateDemFile()
        {
            using (StreamWriter sw = new StreamWriter("dem.txt"))
            {
                var retrieve = new MBRetrieval();

                        foreach (Student student in retrieve.studentList)
code goes on