private static StubPlatformFile CreateTransmissionFile(Uri endpointAddress = null, byte[] content = null)
        {
            endpointAddress = endpointAddress ?? new Uri("http://address");
            content = content ?? new byte[1];

            var transmission = new Transmission(endpointAddress, content, string.Empty, string.Empty);

            var fileStream = new MemoryStream();
            transmission.Save(fileStream);
            fileStream.Seek(0, SeekOrigin.Begin);

            return CreateFile("TestFile" + TransmissionStorage.TransmissionFileExtension, fileStream);
        }
 private static long SaveTransmissionToFile(Transmission transmission, IPlatformFile file)
 {
     using (Stream stream = file.Open())
     {
         transmission.Save(stream);
         return stream.Length;
     }
 }