create a http server and read the request body as multipart form data in csharp

main.cs
using System;
using System.IO;
using System.Net;
using System.Text;

public class HttpServer {
    public static void Main(string[] args) {
        HttpListener listener = new HttpListener();
        listener.Prefixes.Add("http://localhost:8080/");
        listener.Start();
        Console.WriteLine("Listening...");

        while (true) {
            HttpListenerContext context = listener.GetContext();
            HttpListenerRequest request = context.Request;
            string method = request.HttpMethod;
            string path = request.Url.LocalPath;

            Console.WriteLine("{0} {1}", method, path);

            // Read the request body as multipart form data
            if (method == "POST") {
                MemoryStream ms = new MemoryStream();
                request.InputStream.CopyTo(ms);
                byte[] data = ms.ToArray();
                string contentType = request.ContentType;
                if (contentType.StartsWith("multipart/form-data")) {
                    MultipartFormDataParser parser = new MultipartFormDataParser(data, contentType);
                    foreach (var file in parser.Files) {
                        Console.WriteLine("Received file: {0}", file.FileName);
                        // Do something with the file
                    }
                    foreach (var field in parser.Fields) {
                        Console.WriteLine("{0}: {1}", field.Name, field.Value);
                        // Do something with the field value
                    }
                }
            }

            HttpListenerResponse response = context.Response;
            string responseString = "Hello, World!";
            byte[] responseBytes = Encoding.UTF8.GetBytes(responseString);
            response.ContentType = "text/plain";
            response.ContentEncoding = Encoding.UTF8;
            response.ContentLength64 = responseBytes.Length;
            response.OutputStream.Write(responseBytes, 0, responseBytes.Length);
            response.OutputStream.Close();
        }
    }
}
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