StreamReader.ReadToEnd() returning an empty string

Question

I have a method

private static String DecompressAndDecode(byte[] data)
{
   GZipStream decompressor = new GZipStream(new MemoryStream(data), CompressionMode.         


        

Answer 1

"There must be something obvious I'm missing here." - maybe, and so am I ;-)
Let's start with a little self-contained example and see where it differs from your actual code.

class SOTest
{
  private static String DecompressAndDecode(byte[] data)
  {
    GZipStream decompressor = new GZipStream(new MemoryStream(data), CompressionMode.Decompress);
    StreamReader decompressed = new StreamReader(decompressor, Encoding.UTF8);
    String result = decompressed.ReadToEnd();
    return result;
  }

  private static byte[] foo(string data)
  {
    MemoryStream dest = new MemoryStream();
    using (GZipStream compressor = new GZipStream(dest, CompressionMode.Compress))
    {
      using (StreamWriter sw = new StreamWriter(compressor))
      {
        sw.Write(data);
      }
    }
    return dest.GetBuffer();
  }


  static void Main()
  {
    System.Console.WriteLine(
      DecompressAndDecode(foo("Mary had a little lamb."))
    );
    return;
  }
}

prints Mary had a little lamb.