Download a mp3 file from an url C# code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;
using System.Configuration;

namespace example
{
    /// <summary>
    /// Summary description for intakeDownload
    /// </summary>
    public class downlaod: IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            //context.Response.ContentType = "text/plain";
            //context.Response.Write("Hello World");

            // Get the file name from the query string
            string queryFile = context.Request.QueryString["file"];

            // Ensure that we were passed a file name
            if (string.IsNullOrEmpty(queryFile))
                throw new HttpException(404, null);

            // Generate the server file name
            string file = Path.Combine(ConfigurationManager.AppSettings["upload_path"], queryFile);

            // Ensure that the file exists
            if (!File.Exists(file))
            {
                throw new HttpException(404, null);
            }
            else
            {
                //context.Response.ContentType = "image/jpeg";
                context.Response.ContentType = "application/octet-stream";

                // Set the filename
                context.Response.AddHeader("content-disposition", "attachment;filename=" + queryFile);

                // Stream the file to the client
                context.Response.WriteFile(file);
            }

        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}