C# Uploading Multiple Files to FTP Sever using Console Application

Program.cs
--------------

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Configuration;
using System.IO;
using System.Net;
using System.Net.Mail;
using Microsoft.Build.BuildEngine;
namespace ExpeditorsUpload
{
    class Program
    {
        private static Boolean Flag = true;
        static void Main(string[] args)
        {
            string DCLfolder = ConfigurationManager.AppSettings["Expeditorsfolder"];
            FileInfo[] DCLfiles = new DirectoryInfo(DCLfolder).GetFiles();
            foreach (var file in DCLfiles)
            {
                string fl = file.Name;
                if (file.Extension.ToLower() == ".xml")
                {

                    UploadFile(file.FullName);

                    if (Flag)
                    {
                        CreateLogFiles.MessageLog("File " + file.Name + " uploaded to Expeditors");
                        SendEmail(file.Name);
                        if (Flag)
                        {
                            CreateLogFiles.MessageLog("Email sent for uploaded file");
                        }
                    }
                }
            }

        }
        //To Check the File in FTP

        public static bool CheckIfFtpFileExists(string uri)
        {
            FtpWebRequest request = (FtpWebRequest)WebRequest.Create(uri);
            string ftpUserName = ConfigurationManager.AppSettings["FTPuserName"];
            string ftpUserPassword = ConfigurationManager.AppSettings["FTPpassword"];
            request.Credentials = new NetworkCredential(ftpUserName, ftpUserPassword);
            request.Method = WebRequestMethods.Ftp.GetFileSize;
            try
            {

                FtpWebResponse response = (FtpWebResponse)request.GetResponse();
                // THE FILE EXISTS
            }
            catch (WebException ex)
            {
                FtpWebResponse response = (FtpWebResponse)ex.Response;
                if (FtpStatusCode.ActionNotTakenFileUnavailable == response.StatusCode)
                {
                    // THE FILE DOES NOT EXIST
                    return false;
                }
            }
            return true;
        }

        //For Uploading Files To FTP

        private static void UploadFile(String _Path)
        {

            FileInfo fileInf = new FileInfo(_Path);
            string uri = ConfigurationManager.AppSettings["FTP"] + fileInf.Name;
            Boolean ftpAnnonymous = Convert.ToBoolean(ConfigurationManager.AppSettings["FTPanonymous?"]);
            string ftpUserName = ConfigurationManager.AppSettings["FTPuserName"];
            string ftpUserPassword = ConfigurationManager.AppSettings["FTPpassword"];

            FtpWebRequest reqFTP;
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

            if (!ftpAnnonymous)
            {
                reqFTP.Credentials = new NetworkCredential(ftpUserName, ftpUserPassword);
            }
            reqFTP.KeepAlive = false;

            FtpWebResponse response1 = null;
            try
            {

                if (CheckIfFtpFileExists(uri))
                {
                    // File Exists
                }
                else        
                {
                    //File Does Not Exists
                    reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

                    reqFTP.UseBinary = true;
                    reqFTP.ContentLength = fileInf.Length;

                    int buffLength = 2048;
                    byte[] buff = new byte[buffLength];
                    int contentLen;
                    string filename = string.Empty;
                    FileStream fs = fileInf.OpenRead();
                    try
                    {
                        Stream strm = reqFTP.GetRequestStream();
                        contentLen = fs.Read(buff, 0, buffLength);
                        while (contentLen != 0)
                        {
                            strm.Write(buff, 0, contentLen);
                            contentLen = fs.Read(buff, 0, buffLength);
                        }


                        strm.Close();
                        FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                        if (response != null)
                        {
                            fs.Close();
                            FileInfo f = new FileInfo(_Path);
                            string filefullname = f.Name;
                            string fileextension = f.Extension;
                            filename = filefullname.Substring(0, filefullname.Length - fileextension.Length);
                            if (File.Exists(f.DirectoryName + "\\" + filename + ".upl"))
                            {
                                File.Delete(f.DirectoryName + "\\" + filename + ".upl");
                            }
                            f.MoveTo(Path.ChangeExtension(_Path, ".upl"));

                        }
                    }
                    catch (WebException webex)
                    {
                        Flag = false;
                        CreateLogFiles.MessageLog(webex.Message);
                    }
                    catch (Exception exe)
                    {
                        Flag = false;
                        CreateLogFiles.MessageLog(exe.Message);
                     
                    }
                    finally
                    {
                        fs.Close();
                    }

                }


            }
            catch (Exception ex)
            {
                CreateLogFiles.MessageLog(ex.Message);
            }
        }

        //For Sending Email
        private static void SendEmail(String Fname)
        {
            MailMessage mail = new MailMessage();
            mail.Subject = "File Uploaded";
            mail.From = new MailAddress("thoutamurali@gmail.com");
            mail.To.Add("mthouta@adaequare.com");
            mail.Body = "Hello! your file has been Uploaded to FTP...";

            SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
            smtp.EnableSsl = true;
            NetworkCredential netCre = new NetworkCredential("thoutamurali@gmail.com", "9390868000");
            smtp.Credentials = netCre;

            try
            {

                smtp.Send(mail);
            }
            catch (Exception ex)
            {
                CreateLogFiles.MessageLog(ex.Message);
                Flag = false;
            }
        }
    }
}

Web.config:
---------------

<?xml version="1.0"?>
<configuration>
  <appSettings>
    <add key="Expeditorsfolder" value="C:\Users\abc\Desktop\xml_documents"/>

    <add key="ProcessedPath" value="C:\Users\abc\Desktop\Processed Documents"/>
 
    <add key="FTP" value="ftp://192.168.1.7/Ramu/"/>
    <add key="FTPuserName" value="abc"/>
    <add key="FTPpassword" value="123"/>
    <add key="FTPanonymous?" value="false"/>
   

    <add key="FromEmail" value="abc@gmail.com"/>
    <add key="ToEmail" value="abc@gmail.com"/>
    <add key="Host" value="smtp.gmail.com"/>
    <add key="Port" value="587"/>
    <add key="Password" value="1234"/>
    <!--<add  key ="1" value="1forTria"/>-->
    <!--<add key="Logpath" value ="C:\Users\abc\Documents\Test\log\"/>-->

    <add key="Logpath" value="D:\Test\log\"/>
  </appSettings>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>