Trying to read a .xls file and I get this --> Error: Neither stream 'Workbook' nor 'Book' was found in file.
Stepping though the code while it was reading the file confirms the error message is technically right. There is a 'WORKBOOK' entry though.
At the bottom of the XlsRootDirectory.cs file, is a method FindEntry that does the finding. I just changed it to be case insensitive and it read the file ok.
(e.EntryName == EntryName)