[
  {
    "Id": "220255",
    "ThreadId": "64680",
    "Html": "<p>Hi Cheeso,</p>\r\n<p><br>I'm using your dll (Ver 1.8.4.14)&nbsp; in an application I'm working on, I&rsquo;m unable to unzip some files using the dll, the file will not open with either my application or your DotNetZip-WinFormsTool although the files can be unzipped with winzip and winRaR.<br><br>Unfortunately the zipped file is subject to copyright as it is a karaoke file consisting of mp3 and a graphics files, placing it on a public forum would be in breach of copyright law, I have mailed you directly of one of the files.<br><br><br>Alan<br><span style=\"font-family:Arial;font-size:x-small\"><span style=\"font-family:Arial;font-size:x-small\">&nbsp;</span></span><span style=\"font-size:x-small\"><span style=\"font-family:Times New Roman\"> <br></span></span></p>\r\n<p>&nbsp;</p>",
    "PostedDate": "2009-08-06T02:58:29.067-07:00",
    "UserRole": null,
    "MarkedAsAnswerDate": null
  },
  {
    "Id": "220331",
    "ThreadId": "64680",
    "Html": "<p>Thanks for using the forums.</p>\r\n<p>I looked at the file you sent.&nbsp; It is compressed with DEFLATE64, which is a proprietary compression format, defined but not documented by PKWARE.&nbsp; It has limited advantages as far as I know, oevr DEFLATE, which is supported very widely.</p>\r\n<p>So, no, DotNetZip cannot open or read that zip file.</p>\r\n<p>&nbsp;</p>",
    "PostedDate": "2009-08-06T06:26:14.383-07:00",
    "UserRole": null,
    "MarkedAsAnswerDate": null
  },
  {
    "Id": "220374",
    "ThreadId": "64680",
    "Html": "<table border=0 width=800>\r\n<tbody>\r\n<tr>\r\n<td>\r\n<p>The exception I get is:</p>\r\n<pre>exception: Ionic.Zip.ZipException: Cannot extract ---&gt; System.ArgumentException: Unsupported Compression method (0x09)\r\n   at Ionic.Zip.ZipEntry.ValidateCompression() in c:\\dinoch\\dev\\dotnet\\zip\\DotNetZip\\Zip Partial DLL\\ZipEntry.cs:line 2903\r\n</pre>\r\n<p>&nbsp;</p>\r\n</td>\r\n</tr>\r\n</tbody>\r\n</table>",
    "PostedDate": "2009-08-06T07:40:15.2-07:00",
    "UserRole": null,
    "MarkedAsAnswerDate": null
  },
  {
    "Id": "220489",
    "ThreadId": "64680",
    "Html": "<table border=0 width=800>\r\n<tbody>\r\n<tr>\r\n<td>\r\n<p>I've changed that exception to:</p>\r\n<pre>exception: Ionic.Zip.ZipException: Entry FileNameHere.txt  uses an unsupported compression method (0x09, DEFLATE64)\r\n</pre>\r\n</td>\r\n</tr>\r\n</tbody>\r\n</table>",
    "PostedDate": "2009-08-06T12:06:42.123-07:00",
    "UserRole": null,
    "MarkedAsAnswerDate": null
  },
  {
    "Id": "555329",
    "ThreadId": "64680",
    "Html": "\r\n<p>Disregard my comments below. Apperantly Windows 7 uses deflate64 for large files by default and Winzip 9 displays Deflate64 as &quot;Deflate (enhanced)&quot;.. The exception message is accurate.</p>\r\n<p>&nbsp;</p>\r\n<hr>\r\n<p><em>Actually I can confirm, this is bug in the code. I get the same error &quot;&#65279;&#65279;&#65279;&#65279;Entry XXXX uses an unsupported compression method (0X09, DEFLATE64)&quot; . Here is the replication steps:</em></p>\r\n<p><em>1. Compress a large file (3 GB) using Windows .. I am using Windows 7</em><br>\r\n<em>2.&nbsp;Open it with&nbsp;Winzip&nbsp; (I have&nbsp;Winzip 9)</em><br>\r\n<em>3. Encrypt it using&nbsp;AES256.</em><br>\r\n<em>4. Confirm compression method is Deflate from&nbsp;Winzip&gt;File&gt;Properties</em><br>\r\n<em>5. Try to unzip&nbsp;it with Ionic.Zip&nbsp; ... You will get&nbsp;the message above even though compression is not Deflate64 and these exact steps do not cause an exception in small files.</em></p>\r\n<p>&#65279;</p>\r\n",
    "PostedDate": "2011-01-25T18:44:56.187-08:00",
    "UserRole": null,
    "MarkedAsAnswerDate": null
  },
  {
    "Id": "695289",
    "ThreadId": "64680",
    "Html": "<p>Hi, i experienced this issue today on a file compressed by WinZip v9 SR-01 using the Compression value of Maximum (enhanced deflate)</p>\r\n<p>This was using version extracting via 1.9.1.5</p>\r\n<p>testing the zip returned the exception above however testing the archive under 7zip the archive was without error and of course winzip can deal with it.</p>\r\n<p>1) has the library been update to support this compression method?</p>\r\n<p>2) if not is there any plans to? would be useful....</p>\r\n<p>Many thanks</p>\r\n<p>Matt</p>\r\n<p>&nbsp;</p>\r\n<p>&nbsp;</p>",
    "PostedDate": "2011-11-08T05:19:30.247-08:00",
    "UserRole": null,
    "MarkedAsAnswerDate": null
  },
  {
    "Id": "695847",
    "ThreadId": "64680",
    "Html": "<p>NO.&nbsp; DotNetZip still does not support WinZip's proprietary compression methods.</p>\r\n<p>I have no plans to build that. If someone else would like to contribute code that does the work, along with tests verifying that code,&nbsp;I'll consider integrating it into DotNetZip.</p>",
    "PostedDate": "2011-11-09T06:20:06.113-08:00",
    "UserRole": null,
    "MarkedAsAnswerDate": null
  },
  {
    "Id": "696082",
    "ThreadId": "64680",
    "Html": "<p>Ok, thanks for the reply, and thanks for the great library!</p>",
    "PostedDate": "2011-11-09T12:09:06.727-08:00",
    "UserRole": null,
    "MarkedAsAnswerDate": null
  }
]