apicall.cs

using System;
using System.Net;
using System.Net.Http;
using System.Text;
using System.Collections.Specialized;


public class Program
{
    public static void Main()
    {
        var client = new ProxyWebClient();
        client.BaseAddress = "http://202.153.230.150/";
        try
        {
            client.Headers.Clear();
            client.Headers.Add(HttpRequestHeader.ContentType, "application/x-www-form-urlencoded");
            client.Headers.Add(HttpRequestHeader.Host, "info.krl.co.id");
            var parameters = new NameValueCollection{{"stasiun_id", "UI"}};
            var response = client.UploadValues("BhIRFhUeRAtUA0dQBlVSXltCABZdAFgadENeUQwETxpIEEETFBoIB0poVQtVUw0FTk9SFV8dUQZAFl0SCkZfUlFKCVUBDgIBBgNTOjQ5YmZkY2Y4", HttpMethod.Post.Method, parameters);
            var content = Encoding.UTF8.GetString(response);
            Console.WriteLine(content);
//            return ResponseMessage(new HttpResponseMessage{StatusCode = HttpStatusCode.OK, Content = new StringContent(content)});
        }
        catch (WebException exception)
        {
            Console.Write("Hadehhh");
        }
    }
}

public class ProxyWebClient : WebClient
{
    
    private int RequestTimeout = 10000;

    protected override WebRequest GetWebRequest(Uri address)
    {
        var request = base.GetWebRequest(address);
        if (request != null)
            request.Timeout = RequestTimeout;
        return request;
    }
}