I am using EPPlus open source tool for open excel files on server. When I try to open it using EPPlus some time I am getting error. Then I download it to local machine & when I open it using MS Excel I got error like excel found unreadable content Do you want to recover workbook? I repair it using MS Excel again upload it and then it start working correctly.
What is actual problem? Can I reapair it using EPPlus itself?
Try with new version of EPPlus
EPPlus 4.0 fixed mostly bugs
Save() and Dispose() created instance of excelPackage for better performance