unsupported compression method

Apr 18, 2014 at 11:06 PM
Edited Apr 23, 2014 at 2:52 PM
Hello Cheeso,

Some of zips we got could not be extracted with DotNetZip. The exception we get while extracting is :
uses an unsupported compression method (0x09, DEFLATE64)

Is there a method in the ZipFile object which can tell that DotNetZip cannot extract this zip file. We need some method to know upfront that a zipfile cannot be extracted especially because DotNetZip only supports zip format. Please help. I have already asked this at other places. All we need is:
a method to know upfront that a certain zipfile cannot be extracted due to "unsupported format"
Thanks
Leo

PS: As per you suggestion I moved from commenting elsewhere to here .. please respond