upload photo to ACS

        byte[] filedata = null;
                    using (BinaryReader readerr = new BinaryReader(File.OpenRead("\\tmp.jpg")))
                        filedata = readerr.ReadBytes((int)readerr.BaseStream.Length);
                    string boundary = "-_1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
                    HttpWebRequest request = (HttpWebRequest)WebRequest.Create("url");
                    Stream stream = request.GetRequestStream();
                    request.ContentType = string.Format("multipart/form-data; boundary={0}", boundary);
                    StreamWriter writer = new StreamWriter(stream);
                    writer.Write("--");
                    writer.WriteLine(boundary);
                    writer.WriteLine(@"Content-Disposition: form-data; name=""{0}""; filename=""{1}""", "your_name", "your_photo_file_name");
                    writer.WriteLine(@"Content-Type: application/octet-stream");
                    writer.WriteLine(@"Content-Length: " + filedata .Length);
                    writer.WriteLine();
                    writer.Flush();
                    Stream output = writer.BaseStream;
                    output.Write(filedata , 0, filedata .Length);
                    output.Flush();
                    writer.WriteLine();
                    writer.Write("--");
                    writer.Write(boundary);
                    writer.WriteLine("--");
                    writer.Flush();