End of Central Directory record could not be found

Question

I am downloading a zip file using c# program and I get the error

at System.IO.Compression.ZipArchive.ReadEndOfCentralDirectory()
   at System.IO.Compression         


        

Answer 1

Write down the stream to a file then inspect it with a (hex) editor.
I got the same message in Visual Studio when downloading nupkg from nuget.org. It was because nuget.org was blacklisted by the firewall. So instead of the pkg I got a html error page which (of course) cannot be unzipped.