SharePoint 2013/2016 Download all attachments from SharePoint List- using Client Context(C#)

using Microsoft.SharePoint.Client;

using System;

using System.Collections.Generic;

using System.Data;

using System.IO;

using System.Net;

using System.Reflection;

using System.Text;

using System.Threading.Tasks;

namespace SharePointConsoleApps

{

    class Program

    {

static void Main(string[] args)

        {

ClientContext ctx = new ClientContext("http://sp2016:1234/sites/testSite/");

            //Retrieve list items attachments

            var list = ctx.Web.Lists.GetByTitle("testList");

            var items = list.GetItems(CamlQuery.CreateAllItemsQuery());

            ctx.Load(items, icol => icol.Include(i => i["ID"], i => i.AttachmentFiles));

            ctx.ExecuteQuery();

            int count = 0;

            //attachment Urls for list items

            foreach (var item in items)

            {

                if (item.AttachmentFiles.Count > 0)

                {

                    Console.WriteLine("count" + count++);                 

                    foreach (var attachment in item.AttachmentFiles)

                    {

                        Console.WriteLine(attachment.ServerRelativeUrl);

                        FileInfo myFileinfo = new FileInfo(attachment.FileName);

                        using (WebClient client1 = new WebClient())

                        {

                            

                            client1.Headers["Accept"] = "/";

                            client1.Headers.Add("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)");

                            Uri uri = new Uri("http://sp2016:1234");

                            ICredentials credentials = CredentialCache.DefaultCredentials;

                            NetworkCredential credential = credentials.GetCredential(uri, "Basic");

                            client1.Credentials = credential;

                            client1.DownloadFile("http://sp2016:1234" + attachment.ServerRelativeUrl, @"D:/Jaison Arumugam/Downloads/" + attachment.FileName);

                            Console.WriteLine("Downloading " + attachment.ServerRelativeUrl);

                        }

                    }

                }

                else

                {

                    Console.WriteLine("For {0} list item no attachments were found", item["ID"]);

                }

            }

}

}

}