[absconder]

private void ReadWriteStream(Stream readStream, Stream writeStream) 
{
    int Length = 256;
    Byte [] buffer = new Byte[Length];
    int bytesRead = readStream.Read(buffer,0,Length);
    while( bytesRead > 0 ) 
    {
        writeStream.Write(buffer,0,bytesRead);
        bytesRead = readStream.Read(buffer,0,Length);
    }
    readStream.Close();
    writeStream.Close();
}

string saveTo = "some path to save"
FileStream writeStream = new FileStream(saveTo, FileMode.Create, FileAccess.Write);
ReadWriteStream(readStream,writeStream);