anchor.diff:  #if FX_NO_WEBREQUEST_AUTOMATICDECOMPRESSION
           new MemoryStream(Ionic.Zlib.DeflateStream.UncompressBuffer(memoryStream.ToArray()))
   #else
  +        failwith "Automatic deflate decompression failed"
           memoryStream
   #endif
   
  
positive.code:         // set headers
          let hasContentType = setHeaders headers req
  
      #if FX_NO_WEBREQUEST_AUTOMATICDECOMPRESSION
          if not (req?AutomaticDecompression <- 3) then 
              req.Headers.[HeaderEnum.AcceptEncoding] <- "gzip,deflate"
      #else
          req.AutomaticDecompression <- DecompressionMethods.GZip ||| DecompressionMethods.Deflate
  
negative.code: #if FX_NO_WEBREQUEST_AUTOMATICDECOMPRESSION
          new MemoryStream(Ionic.Zlib.GZipStream.UncompressBuffer(memoryStream.ToArray()))
  #else
          failwith "Automatic gzip decompression failed"
          memoryStream
  #endif
  
  