Stream wrapper to make Stream seekable?

Question

I have a readonly System.IO.Stream implementation that is not seekable (and its Position always returns 0). I need to send it to a consumer that do

Answer 1

Another solution might be to create your own stream class which wraps the other stream. Implement Seek as a NOP.

class MyStream : Stream
{
    public MyStream(Stream baseStream) { this.baseStream = baseStream; }
    private Stream baseStream;

    // Delegate all operations except Seek/CanSeek to baseStream

    public override bool CanSeek { get { return true; } }
    public override long Seek(long offset, SeekOrigin origin) { return baseStream.Position; }
}

If the player is seeking for no good reason, this might just work.