c# - How do I concatenate two System.Io.Stream instances into one? -

let's imagine want stream 3 files user in row, instead of him handing me stream object push bytes down, have hand him stream object he'll pull bytes from. i'd take 3 filestream objects (or cleverer, ienumerable<stream>) , return new concatenatedstream object pull source streams on demand.

class concatenatedstream : stream {     queue<stream> streams;      public concatenatedstream(ienumerable<stream> streams)     {         this.streams = new queue<stream>(streams);     }      public override bool canread     {         { return true; }     }      public override int read(byte[] buffer, int offset, int count)     {         if (streams.count == 0)             return 0;          int bytesread = streams.peek().read(buffer, offset, count);         if (bytesread == 0)         {             streams.dequeue().dispose();             bytesread += read(buffer, offset + bytesread, count - bytesread);         }         return bytesread;     }      public override bool canseek     {         { return false; }     }      public override bool canwrite     {         { return false; }     }      public override void flush()     {         throw new notimplementedexception();     }      public override long length     {         { throw new notimplementedexception(); }     }      public override long position     {                 {             throw new notimplementedexception();         }         set         {             throw new notimplementedexception();         }     }      public override long seek(long offset, seekorigin origin)     {         throw new notimplementedexception();     }      public override void setlength(long value)     {         throw new notimplementedexception();     }      public override void write(byte[] buffer, int offset, int count)     {         throw new notimplementedexception();     } }