public override long Seek(long offset, SeekOrigin origin) { //NS_SEEK_SET 0 Specifiesthat the offset is relative to the start of the stream. //NS_SEEK_CUR 1 Specifies that the offset is relative to the current position in the stream. //NS_SEEK_END 2 Specifies that the offset is relative to the end of the stream. _seekableStream.Seek((int)origin, (int)offset); return(_seekableStream.Tell()); }