The best replacement for filestream is streamreader.

The best alternatives to filestream are rated as following:
★★★★★  streamreader
★★★★  memorystream
★★★  stream
★★★  blob
★★★  file table
★★★  binaryreader
★★  streamwriter c#
★★  file
★★  rbs
★  binarywriter
★  bufferedstream
★  streamreader c#
★  file.copy
★  streamwriter
  file.readallbytes
  varbinary

Your alternative for filestream is not listed? Suggest!
Speaking about filestream, one probably shouldn't forget about streamreader.

Other search terms related to filestream and their ratings are:
★★★★★ streamreader
★★★★ memorystream
★★ streamwriter
You have in mind a companion for filestream and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of filestream in all years. Click on graph for more.
filestream
streamreader
memorystream