Extension for converting System.IO.Stream to IEnumerable<byte>

StreamToEnumerableExtension.cs

using System.IO;
using System.Collections.Generic;
static class StreamToEnumerableExtension
{
  public static IEnumerable<byte> AsEnumerable(this Stream stm, int bufferSize = 1024*50, CancellationToken ctoken = default(CancellationToken))
  {
    var buf = new byte[bufferSize];
    do
    {
      ctoken.ThrowIfCancellationRequested();
      var bytesread = stm.Read(buf, 0, bufferSize);
      if(bytesread == 0)
      {
        break;
      }
      for (int i = 0; i < bytesread; i++)
      {
        yield return buf[i];
      }
    } while (true);
  }
}