c# WPF convert photo to Sketch effects

using the online website https://imagetosketch.com/

<Window x:Class="WpfMosaic.PhotoSketchWind"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfMosaic"
        mc:Ignorable="d"
        Title="PhotoSketchWind" Height="450" Width="800">
    <Grid>
        <Border>
            <WrapPanel ScrollViewer.HorizontalScrollBarVisibility="Visible"
              ScrollViewer.VerticalScrollBarVisibility="Visible"
              x:Name="wrapPanel">
            </WrapPanel>
        </Border>

    </Grid>
</Window>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace WpfMosaic
{
    /// <summary>
    /// Interaction logic for PhotoSketchWind.xaml
    /// </summary>
    public partial class PhotoSketchWind : Window
    {
        public PhotoSketchWind()
        {
            InitializeComponent();
            Loaded += PhotoSketchWind_Loaded;
        }

        private void PhotoSketchWind_Loaded(object sender, RoutedEventArgs e)
        {
            string imgFile = @"C:\Users\gwang\source\repos\WpfMosaic\bin\Debug\12.jpg";
            ProcessPhoto(imgFile);
        }

        void ProcessPhoto(string imgFile)
        {
            var files = ImageSketchServer.ProcessPhoto(imgFile);
            if (files != null && files.Count > 0)
            {
                foreach (var f in files)
                {
                    var img = new Image() { MaxWidth = 222, Source = new BitmapImage(new Uri(f, UriKind.RelativeOrAbsolute)) };
                    img.Tag = f;
                    img.MouseLeftButtonDown += Img_MouseLeftButtonDown;
                    wrapPanel.Children.Add(img);
                }

            }

        }

        private void Img_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            System.Diagnostics.Process.Start("" + (sender as Image).Tag);
        }
    }
}

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace WpfMosaic
{
    public class Httphelper
    {

        public static string Upload(string url, string filePath)
        {
            try
            {
                string modelId = "4f1e2e3d-6231-4b13-96a4-835e5af10394";
                string updateTime = "2016-11-03 14:17:25";
                string encrypt = "f933797503d6e2c36762428a280e0559";
                string fileName = Path.GetFileName(filePath);

                byte[] fileContentByte = File.ReadAllBytes(filePath);

                //#region 将文件转成二进制

                //FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);
                //fileContentByte = new byte[fs.Length]; // 二进制文件
                //fs.Read(fileContentByte, 0, Convert.ToInt32(fs.Length));
                //fs.Close();

                //#endregion

                #region 定义请求体中的内容 并转成二进制

                string boundary = "WebKitFormBoundarybgqrda0HwT2BjMam";
                string Enter = "\r\n";

                string modelIdStr = "--" + boundary + Enter
                        + "Content-Disposition: form-data; name=\"modelId\"" + Enter + Enter
                        + modelId + Enter;

                string fileContentStr = "--" + boundary + Enter
                        + "Content-Type:bimage/jpeg" + Enter
                        + "Content-Disposition: form-data; name=\"myfile\"; filename=\"" + fileName + "\"" + Enter + Enter;

                string updateTimeStr = Enter + "--" + boundary + Enter
                        + "Content-Disposition: form-data; name=\"updateTime\"" + Enter + Enter
                        + updateTime;

                string encryptStr = Enter + "--" + boundary + Enter
                        + "Content-Disposition: form-data; name=\"encrypt\"" + Enter + Enter
                        + encrypt + Enter + "--" + boundary + "--";

                var modelIdStrByte = Encoding.UTF8.GetBytes(modelIdStr);//modelId所有字符串二进制

                var fileContentStrByte = Encoding.UTF8.GetBytes(fileContentStr);//fileContent一些名称等信息的二进制（不包含文件本身）

                var updateTimeStrByte = Encoding.UTF8.GetBytes(updateTimeStr);//updateTime所有字符串二进制

                var encryptStrByte = Encoding.UTF8.GetBytes(encryptStr);//encrypt所有字符串二进制

                var endString = Encoding.UTF8.GetBytes(Enter + "--" + boundary + "--");

                #endregion

                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                request.Method = "POST";
                request.ContentType = "multipart/form-data;boundary=" + boundary;

                Stream myRequestStream = request.GetRequestStream();//定义请求流

                #region 将各个二进制 安顺序写入请求流 modelIdStr -> (fileContentStr + fileContent) -> uodateTimeStr -> encryptStr

                // myRequestStream.Write(modelIdStrByte, 0, modelIdStrByte.Length);

                myRequestStream.Write(fileContentStrByte, 0, fileContentStrByte.Length);
                myRequestStream.Write(fileContentByte, 0, fileContentByte.Length);

                //  myRequestStream.Write(updateTimeStrByte, 0, updateTimeStrByte.Length);

                //  myRequestStream.Write(encryptStrByte, 0, encryptStrByte.Length);

                myRequestStream.Write(endString, 0, endString.Length);

                #endregion

                HttpWebResponse response = (HttpWebResponse)request.GetResponse();

                Stream myResponseStream = response.GetResponseStream();
                StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));

                string retString = myStreamReader.ReadToEnd();

                myStreamReader.Close();
                myResponseStream.Close();

                return retString;
            }
            catch
            {

                return "";

            }

        }
        public static string HttpGet(string url)
        {
            try
            {
                //https://access.sketcherai.com:8999/status/iDHMujs3
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                request.Method = "Get";
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                Stream myResponseStream = response.GetResponseStream();
                StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
                string retString = myStreamReader.ReadToEnd();

                myStreamReader.Close();
                myResponseStream.Close();

                return retString;
            }
            catch
            {

                return "";
            }

        }

    }

    public class ImageSketchServer
    {
        public static List<string> ProcessPhoto(string filePath)
        {
            string url = "https://access.sketcherai.com:8999/upload";
            string token = Httphelper.Upload(url, filePath);
            if (string.IsNullOrEmpty(token))
            {
                return null;
            }
            url = "https://access.sketcherai.com:8999/status/" + token;
            string abcs = Httphelper.HttpGet(url);

            if (string.IsNullOrEmpty(abcs))
            {
                return null;
            }
            else
            {

                //thumb img: https://access.sketcherai.com:8889/results/iDHMujs3_a_tn.jpg
                //org img: https://access.sketcherai.com:8889/results/iDHMujs3_a.jpg

                List<string> list = new List<string>();
                foreach (var c in abcs)
                {
                    list.Add("https://access.sketcherai.com:8889/results/iDHMujs3_" + c + "_tn.jpg");
                }
                return list;
            }

        }
        public static string ToOriginal(string thPath)
        {

            return thPath.Replace("_tn.jpg", ".jpg");
        }

    }

}