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Editorial Team
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Asked: 2026-06-03T17:44:12+00:00

I’m trying to send a big chunk of data through WCF (some GBs). I

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I’m trying to send a big chunk of data through WCF (some GBs). I would like to compress the file while reading it using Streams, but looks like DeflateStream has two modes:

  • Compress (writes on the stream)
  • Decompress (reads the stream)

None of these modes works in my case. I would like to read an un-compressed file from disk and return a compressed stream through WCF.

Is there a way to do so, or I have to use a temporal file (or MemoryStream)?

Is a missing feature or is just not possible for some reason?

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1 Answer

  1. Editorial Team

    It looks like you are trying to compress while reading the file. The way deflatestream is written, compression has to happen as part of a write. Try wrapping the stream that you are sending over the wire, not the stream that you are reading off disk. If they are the same, you need an intermediate stream.

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