Captcha bypass

using System;
using System.Linq;
using System.Threading.Tasks;
using RestSharp;

namespace TwoCaptchaSharp
{



    enum Language { CaptchaDefault = 0, Russian = 1, English = 2 }
    public class TwoCaptchaSharp
    {


        public string Key { get; set; }
        public string RecaptchaTextInstructions { get; set; }
        public int Language { get; set; }
        public int GetIdCaptcha;
        public TwoCaptchaSharpImage Image;




        public Task<string> ExecuteAsync()
        {
            var t = new Task<string>(() =>
            {

                return this.Execute();

            });
            return t;
        }



        public string Execute()
        {
            string result = string.Empty;
            if (String.IsNullOrEmpty(Key))
                throw new Exception("Key provided is empty of null");
            if (string.IsNullOrEmpty(RecaptchaTextInstructions))
                throw new Exception("Instructions provided is empty of null");
            if (!(new int[] { 0, 1, 2 }).ToList<int>().Contains(Language))
                throw new Exception("Unrecognizable language number. 0 is Default, Russian is 1 and English is 2");
            if (!(new int[] { 0, 1 }).ToList<int>().Contains(GetIdCaptcha))
                throw new Exception("GetIdCaptcha value is not correct.");
            if (Image == null)
                throw new System.NullReferenceException();

            var TwoCaptcha = new RestClient("http://rucaptcha.com");
            var Request = new RestRequest("/in.php", Method.POST);

            if (Image.IsPathDefined)
                Request.AddFile("file", Image.Path, null);
            else
                Request.AddFile("file", Image.ByteArr, null, null);

            Request.AddParameter("language", Language);
            Request.AddParameter("2Captcha", 1);
            Request.AddParameter("textinstructions", string.Format("%{0}%", RecaptchaTextInstructions));
            Request.AddParameter("get_id", GetIdCaptcha);


            return TwoCaptcha.Execute(Request).Content;

        }


        public TwoCaptchaSharp(string key)
        { Key = key; }

    }
    public class TwoCaptchaSharpImage
    {




        public TwoCaptchaSharpImage(string path)
        {
            Extensions = new string[] { ".jpg", ".png", ".jpeg" };
            var info = new System.IO.FileInfo(path);
            if (!info.Directory.Exists)
            { throw new System.IO.DirectoryNotFoundException(); }
            else if (!info.Exists)
            { throw new System.IO.FileNotFoundException(); }
            else if (!Extensions.ToList<string>().Exists(x => x == info.Extension.ToLower()))
            { throw new Exception("Incorrect extension. Image extension must be jpg, jpeg or png."); }
            else
            {
                Path = path;
                IsPathDefined = true;
            }
        }


        public TwoCaptchaSharpImage(Byte[] bytearr)
        {

            ByteArr = bytearr;
            IsBytesDefined = true;
        }

        public bool IsPathDefined { get; private set; }
        public bool IsBytesDefined { get; private set; }
        public string Path { get; private set; }
        public Byte[] ByteArr { get; private set; }
        string[] Extensions { get; set; }
    }


}