Can anyone recommend a free library for creating an excel file?

This page summarizes the projects mentioned and recommended in the original post on /r/csharp
Excel Office Poco Biff Mapper

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  • NPOI

    a .NET library that can read/write Office formats without Microsoft Office installed. No COM+, no interop.

    • NPOI: https://github.com/nissl-lab/npoi

  • ExcelMapper

    An Excel to object mapper. Maps POCOs to and from Excel. Configuration via convention, attributes, or fluent methods.

    • Not sure of the limitations but this library has saved me a bunch of time at work both writing and reading excel. https://github.com/mganss/ExcelMapper

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

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NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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