s2industries.ZUGFeRD (nuget): ZUGFeRD and it's successor Factur-X are initiatives from German (respectively European) government to foster electronic invoices. It is based on using PDF/A-3 to store invoices along with embedded xml descriptor for easy processing. A special favor is the so-called XRechnung which is also supported by this library.  This library allows to create these xml descriptors in an easy way.  To help developing the library, please become a sponsor: https://github.com/sponsors/stephanstapel  Find more about the library here: https://github.com/stephanstapel/ZUGFeRD-csharp
Keywords: zugferd|xml|csharp|csharp-library|ebusiness|invoice|invoicing