static void Main(string[] args)
    {
        //Listing all files from a folder

        string filename = getFileList("ftp://ftp.demosite.com/demoFolder/","username","password");


        //Here we know the file name
        FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create("ftp://ftp.demosite.com/demoFolder/"+filename);
        reqFTP.UsePassive = false;
        reqFTP.UseBinary = true;
        reqFTP.Credentials = new NetworkCredential("username","password");
        reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
        reqFTP.Proxy = GlobalProxySelection.GetEmptyWebProxy();

        FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
        Stream responseStream = response.GetResponseStream();

        // for excelread
        StreamReader reader = new StreamReader(responseStream);
        string[] allLines = reader.ReadToEnd().Split(Environment.NewLine.ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
        // for textfile read
        //TextReader tmpReader = new System.IO.StreamReader(responseStream);
        //string fileContents = tmpReader.ReadToEnd();
        Console.WriteLine("Now writing from file....");
        foreach (var item in allLines)
        {
            Console.WriteLine(item);                
        }
        Console.WriteLine("all file content is printed....");
        Console.ReadKey();

    }