MicrosoftLanguageStemmingTokenizer cannot process word 'F#' correctly
'F#' is a well-known programming language, but if you tokenize sentence contains 'F#' with "en.microsoft" analyzer, it will be omitted. However, 'C#' works fine and does not have such issue.
Thank you for your feedback. We’re considering this for a future release of Azure Search.
Azure Search Product Team