C#

Client:

       static void Main(string[] args)
        {
            Console.Write("\nPlease enter the URI to post data to : ");
            String uriString = Console.ReadLine();

            WebClient myWebClient = new WebClient();

            Console.WriteLine("\nPlease enter the fully qualified path of the file to be uploaded to the URI");
            string fileName = Console.ReadLine();
            Console.WriteLine("Uploading {0} to {1} ...", fileName, uriString);

            DateTime begin = DateTime.Now;

            byte[] responseArray = null;
            try
            {
                responseArray = myWebClient.UploadFile(uriString, fileName);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                Console.WriteLine(ex.ToString());
            }

            DateTime end = DateTime.Now;

            Console.WriteLine("Elapsed time is: {0}", (end - begin).TotalMilliseconds);
        }

Server:

    public partial class FileUploadHandler : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            foreach (string f in Request.Files.AllKeys)
            {
                HttpPostedFile file = Request.Files[f];
                file.SaveAs("D:\\UploadFile\\UploadedFiles\\" + file.FileName);
            }
        }
    }

Exception from client side:

Unable to connect to the remote server
System.Net.WebException: Unable to connect to the remote server ---> System.Net.
Sockets.SocketException: No connection could be made because the target machine
actively refused it 10.10.12.162:1031
   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddre
ss socketAddress)
   at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Sock
et s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state,
IAsyncResult asyncResult, Int32 timeout, Exception& exception)
   --- End of inner exception stack trace ---
   at System.Net.WebClient.UploadFile(Uri address, String method, String fileNam
e)
   at FileUploadClient.Program.Main(String[] args) in D:\UploadFile\FileUploadClient\Program.cs:line 30