jahav 

See release notes https://github.com/ClosedXML/ClosedXML/releases/tag/0.105.0 ClosedXML is a .NET library for reading, manipulating and writing Excel 2007+ (.xlsx, .xlsm) files. It aims to provide an intuitive... More information

ClosedXML is a .NET library for reading, manipulating and writing Excel 2007+ (.xlsx, .xlsm) files. It aims to provide an intuitive and user-friendly interface to dealing with the underlying OpenXML API.

A parsing/validation library for various identifiers used in Czech Republic, e.g. IČO (identifier number for legal persons), rodné číslo (birth number), číslo účtu (bank account number).