[Amin_Mansouri]

درود
خواهش میکنم دوست عزیز
اون دانلودر Rate دانلود رو میداد تو زمینه کنترل کردن پهنا باند بهت کمک میکنه
سورس زیر هم بهت کمک میکنه:

کد:

Bandwidth throttling in C# windows application
//Apply bandwidth control
                        int uploadLimit = GlobalClass.GetFileUploadLimit();
                        if (uploadLimit > 0)
                        {
                            long bps = uploadLimit * 1024;
                            const int BufferSize = 8192;
                            MemoryStream mstream = new MemoryStream();//Stream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read, BufferSize);
                            // Openup source stream.
                            using (FileStream sourceStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read, BufferSize))
                            {
                                // Create throttled destination stream.
                                ThrottledStream destinationStream = new ThrottledStream(mstream, bps);
                                byte[] buffer = new byte[BufferSize];
                                int readCount = sourceStream.Read(buffer, 0, BufferSize);
                                while (readCount > 0)
                                {
                                    destinationStream.Write(buffer, 0, readCount);
                                    readCount = sourceStream.Read(buffer, 0, BufferSize);
                                    client.FileUpload(Convert.ToInt16(userId), System.IO.Path.GetFileName(fileName), buffer);//Webservice: Here is the problem
                                }
                            }
                        }