// Class

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Net;

using System.Threading.Tasks;

​

namespace Coding {

    /// <summary>

    /// Service that download images to the directory

    /// </summary>

    public interface IImageDownloader {

        /// <summary>

        /// Creates a directory with images

        /// </summary>

        /// <param name="images">individual images to download from</param>

        /// <returns>url to the directory location that was generated</returns>

        public Task<Uri> BuildDirectoryWithImages(IEnumerable<string> images);

    }

​

    // User story:

    // As user you want to download images from specific urls and get the directory location filled with downloaded images

    public class ImageDownloader : IImageDownloader {  

        public Task<Uri> BuildDirectoryWithImages(IEnumerable<string> images) {

            WebClient webClient = new WebClient();

            Func<IEnumerable<string>,string> selector = x => x.First();

            var imageName = selector(images).Substring(images.First().LastIndexOf("/") + 1);

            dynamic location = "images/imagesDirectory_" + imageName;

            DirectoryInfo directoryInfo() { return Directory.CreateDirectory(location); };

            Uri directoryLocation = new Uri(directoryInfo().FullName);

            foreach (object image in images.ToList().AsEnumerable()) {

                imageName = ((string)image).Substring(image.ToString().LastIndexOf("/") + 1);

                webClient.DownloadFile(image as string, location + "/" + imageName);

            }

            return Task.FromResult(directoryLocation);

        }

    }

}

​

​

// Example call file

namespace Coding {

    internal static class Program {

        static readonly IImageDownloader imageDownloader = new ImageDownloader();

​

        private static void Main() {

            List<string> enumerable = new List<string> {

                "https://www.google.com/images/branding/googlelogo/1x/googlelogo_light_color_272x92dp.png",

                "https://spartez.com/site/themes/spartez/img/logos/Platinum-Marketplace-Partner.svg",

                "https://wac-cdn-2.atlassian.com/image/upload/f_auto,q_auto/dam/jcr:616e6748-ad8c-48d9-ae93-e49019ed5259/Atlassian-horizontal-blue-rgb.svg?cdnVersion=309"

            };

            Console.WriteLine(imageDownloader.BuildDirectoryWithImages(enumerable).GetAwaiter().GetResult());

        }

    }

}