Top 6 C# Spreadsheet Projects

EPPlus

16 1,687 9.5 C#

EPPlus-Excel spreadsheets for .NET (by EPPlusSoftware)

Project mention: Automate Excel with only powershell? | /r/PowerShell | 2023-06-06

Like others, I recommend using the ImportExcel module. It uses and wraps EPPlus Software (EPPlus - Create advanced Excel spreadsheets using .NET (GitHub Project Old / New)) which is a DLL that is included with the ImportExcel PowerShell Module.

ReoGrid

2 1,281 2.7 C#

Fast and powerful .NET spreadsheet component, support data format, freeze, outline, formula calculation, chart, script execution and etc. Compatible with Excel 2007 (.xlsx) format and working on .NET 3.5 (or client profile), WPF and Android platform.
InfluxDB

www.influxdata.com sponsored

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.
Unity-QuickSheet

1 1,010 0.0 C#

Unity-QuickSheet enables you to use spreadsheet file data within Unity editor.
BakingSheet

9 301 5.5 C#

Easy datasheet management for C# and Unity. Supports Excel, Google Sheet, JSON and CSV format.
BulkPDF

1 119 0.0 C#

BulkPDF is a free and easy to use open source software, which allows to automatically fill an existing PDF form with differen values. Only a spreadsheet (Microsoft Excel 2007/2010/2013, LibreOffice or OpenOffice Calc) with the desired values is required.
BlazorDatasheet

2 103 9.4 C#

Simple excel-like datasheet Blazor component

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).