public HttpContent AudioContent(FileInfo audio, long start, long end)
{
return(new PushStreamContent((outputStream, httpContent, transpContext)
=>
{
using (outputStream) // copy file stream vào outputstream theo range trong header
using (Stream inputStream = audio.Open(FileMode.Open, FileAccess.Read, FileShare.Read))
MediaUtilities.CreatePartialContent(inputStream, outputStream, start, end);
//inputStream.CopyTo(outputStream, MediaUtilities.BufferSize);
}, MediaUtilities.GetMimeType(audio.Extension)));
}