C# 开源NuGet插件

ExcelDataReader	开源免费，Excel读取插件	GitHub - ExcelDataReader/ExcelDataReader: Lightweight and fast library written in C# for reading Microsoft Excel files
EPPlus	开源免费，Excel读写插件 （开源免费，新版本收费且不开源）	GitHub - JanKallman/EPPlus: Create advanced Excel spreadsheets using .NET