[Mono-dev] mono 2.6+ : Garbage added to BinaryWriter/GZipStream output?

Hin-Tak Leung hintak_leung at yahoo.co.uk
Tue Jan 26 20:31:51 EST 2010

(I am not on the list - please CC)

I have a small application which writes gzip'ed data like this:

sw = new BinaryWriter(new GZipStream(new FileStream(filename,
      FileMode.Create, FileAccess.Write, FileShare.None),
      CompressionMode.Compress, true

It use to work fine with mono 2.4, and still does in a way with mono 2.6 . 
What happens is that now it seems to append a lot of extra garbage to the end of the output.

The uncompressed data is 1234127 bytes, and still recoverable in a indentical manner from the output with gzip -dc; but the output file is now 8126815 bytes with mono 2.6.x instead of 282363 bytes under mono 2.4.x , so almost 8MB of garbage is added somehow. I tried truncating the file, but it seems to truncate the gz stream as well.

So does anybody else observe similiar problems and/or know of any reasons why mono 2.6 behaves differently in this regard compared to mono 2.4?


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