C# Handling Excel-Files (*.xls, *.xlsx) in Web Applications ICSharpCode.SharpZipLib.Zip.ZipException: EOF in header I'm working on a SaaS application in ASP.NET MVC, which takes your KPIs and presents them to you in clear overviews and graphs, so you can see at a glance, how your business is doing and what needs to change. This is for SMEs, which to a