Exemple API SMS C#

using System;
using System.IO;
using System.Net;
using System.Collections.Generic;
using Newtonsoft.Json;

class Message 
{ 
    public string text { get; set; }
    public string pushtype { get; set; }
    public string sender { get; set; }
    public string delay { get; set; }
}

class Phone 
{ 
    public string gsmsmsid { get; set; }
    public string value { get; set; }
}

class Payload
{
    public SMS sms{ get; set; }
   
    public Payload()   //default contructor 
    { 
        this.sms = new SMS();
    }
}

class Recipients
{
    public List gsm{ get; set;}
   
    public Recipients()
    {
        this.gsm = new List();
    }
}

class SMS
{
    public Message message{ get; set; }
    public Recipients recipients{ get; set;}
   
    public SMS()
    {
        this.recipients = new Recipients();
    }
}
               
public class Program
{
    public static void Main()
    {
        string token = "your.token"; //Your first token must be generated on our plateform at https://my.smsfactor.com/developers/api-tokens
       
        Message msgObj = new Message() 
        { 
            text = "Votre message", 
            pushtype = "alert",
            sender = "DOTNET"
        };
       
        Phone phoneObj = new Phone()
        {
            value = "33612345678"
        };
       
        Payload payloadObj = new Payload();
        payloadObj.sms.message = msgObj;
        payloadObj.sms.recipients.gsm.Add(phoneObj);
       
        string jsonData = JsonConvert.SerializeObject(payloadObj); 
 
        Console.WriteLine(jsonData);
       
        var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://api.smsfactor.com");
        httpWebRequest.Accept = "application/json";
        httpWebRequest.Method = "POST";
        httpWebRequest.Headers.Add("Authorization", "Bearer " + token);

        using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
        {
            streamWriter.Write(jsonData);
            streamWriter.Flush();
            streamWriter.Close();
        }

        var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
        using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
        {
            var result = streamReader.ReadToEnd();
            Console.WriteLine(result);
        }
    }
}