using System;

using RestSharp;

public class Program

{

    public static void Main()

    {

​

        var client = new RestClient("https://test.salesforce.com/services/oauth2/token");

                var request = new RestRequest(Method.POST);

                request.AddHeader("content-type", "application/x-www-form-urlencoded");

                request.AddParameter("application/x-www-form-urlencoded", "grant_type=password&client_id=3MVG9U_dUptXGpYKew7P.oPwrIsvowP_K4CsnkxHJIEOUJzW0XBUUY3o12bLDasjeIPGVobvBZo8TNFcCY6J3&client_secret=3189542819149073716&username=integraciones%40lamarina.com.mx.dev&password=2Password!4iwZvMQKVAwkYyJRy50JlAHk", ParameterType.RequestBody);

                IRestResponse response = client.Execute(request);

        Console.WriteLine("Response.StatusCode: " + response.StatusCode);

        Console.WriteLine("Response.Content: " + response.Content);

        Console.WriteLine("Response.ErrorMessage: " + response.ErrorMessage);

    }

}