WPF, silverlight video streaming, catch streamed video

Question

Hello.

I would like to stream videos, and save it to the hard disc using WPF MediaElement. For example, I'm using this code to play a video from the net:

<MediaElement Source="http://some.url/video.wmv" />

I need to save somehow streamed media file to the hard disc. Can anyone tell me how this is done?

Thanks!