As a free C# excel API, it can enable developers to edit, copy, create, print and convert Excel files which were generated by NPOI. With NpoiExcel, you can create a large range of applications for free. It supports both for the old Excel 97-2003 format (.xls) and for the new Excel 2007 and Excel 2010 (.xlsx).
NPOI excel Webpage:
http://www.nuget.org/packages/ExcelNPOI/
Downloads:
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