using System;

using System.IO;  

using System.Net;  

using System.Text;  

public class Program

{

    public static void Main()

    {

        var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://api.devicewise.com/api");

        httpWebRequest.ContentType = "application/json";

        httpWebRequest.Method = "POST";

​

        using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))

        {

            string json = @"{

  ""auth"" : {

    ""command"" : ""api.authenticate"",

    ""params"" : {

      ""username"": ""eyal@sinapistech.com"",

      ""password"": ""Sinapis12!""

    }

  }

}";

            streamWriter.Write(json);

            streamWriter.Flush();

            streamWriter.Close();

        }

        var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();

        using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))

        {

            var result = streamReader.ReadToEnd();

            Console.Write(result);

        }

    }

}