C# FtpClient code

program.cs

using System;
using System.IO;
using System.Net;
using System.Net.FtpClient;
using System.Threading.Tasks;

namespace FtpClientSample
{
    class Program
    {
        static void Main(string[] args)
        {
            // Install System.Net.FtpClient NuGet package.

            //string fileToWrite = Path.GetTempFileName();
            //Console.WriteLine(fileToWrite);
            //using (FtpClient client = new FtpClient())
            //{
            //    client.Host = "127.0.0.1";
            //    client.Credentials = new NetworkCredential("Tugberk", "123456");
            //    client.Connect();
            //    bool productsDatExsists = client.FileExists("products.dat");
            //    using (Stream stream = client.OpenRead("products.dat"))
            //    using (Stream streamToWrite = File.Open(fileToWrite, FileMode.Append))
            //    {
            //        stream.CopyTo(streamToWrite);
            //    }
            //}

            FtpFileManager ftpFileManager = new FtpFileManager("127.0.0.1", "Tugberk", "123456");
            string fileName = ftpFileManager.DownloadFileAsync("products2.dat", "foo").Result;

            Console.WriteLine(fileName);
            Console.WriteLine("Done");
            Console.ReadLine();
        }
    }

    public class FtpFileManager
    {
        private readonly string host;
        private readonly string username;
        private readonly string password;

        public FtpFileManager(string host, string username, string password)
        {
            this.host = host;
            this.username = username;
            this.password = password;
        }

        public Task<string> DownloadFileAsync(string fileName)
        {
            return DownloadFileAsync(fileName, "/");
        }

        public async Task<string> DownloadFileAsync(string fileName, string workingDirectory)
        {
            string fileToWrite = Path.GetTempFileName();
            await DownloadFileAsync(fileName, workingDirectory, fileToWrite).ConfigureAwait(false);

            return fileToWrite;
        }

        public async Task DownloadFileAsync(string fileName, string workingDirectory, string filePathToWrite)
        {
            using (FtpClient ftpClient = CreateFtpClient())
            {
                await Task.Factory.FromAsync(ftpClient.BeginConnect, ftpClient.EndConnect, state: null).ConfigureAwait(false);
                bool doesDirectoryExist = await Task<bool>.Factory.FromAsync<string>(ftpClient.BeginDirectoryExists, ftpClient.EndDirectoryExists, workingDirectory, state: null).ConfigureAwait(false);
                if (doesDirectoryExist == true)
                {
                    await Task.Factory.FromAsync<string>(ftpClient.BeginSetWorkingDirectory, ftpClient.EndSetWorkingDirectory, workingDirectory, state: null).ConfigureAwait(false);
                    bool doesFileExist = await Task<bool>.Factory.FromAsync<string>(ftpClient.BeginFileExists, ftpClient.EndFileExists, fileName, state: null).ConfigureAwait(false);
                    if (doesFileExist == true)
                    {
                        using (Stream streamToRead = await Task<Stream>.Factory.FromAsync<string>(ftpClient.BeginOpenRead, ftpClient.EndOpenRead, fileName, state: null).ConfigureAwait(false))
                        using (Stream streamToWrite = File.Open(filePathToWrite, FileMode.Append))
                        {
                            await streamToRead.CopyToAsync(streamToWrite).ConfigureAwait(false);
                        }
                    }
                }
            }
        }

        // privates

        private FtpClient CreateFtpClient()
        {
            FtpClient ftpClient = new FtpClient();
            ftpClient.Host = host;
            ftpClient.Credentials = new NetworkCredential(username, password);

            return ftpClient;
        }
    }
}

First line is not returning result so it is not executing remaining three line please help me solve this problem.

string fileName = ftpFileManager.DownloadFileAsync("products2.dat", "foo").Result; // Not returning result

Console.WriteLine(fileName); // Not executing
Console.WriteLine("Done"); // Not executing
Console.ReadLine(); // Not executing