GabrielMatte 

High-performance, low-allocation .NET library for reading and writing XLSX, XLSB, XLS, and CSV — streaming readers, typed row parsing, and workbook writers for all four formats.

Apache Arrow RecordBatch conversion for ExcelReader.NET.

Command-line workbook inspection and CSV conversion, built on ExcelReader.NET.

High-performance, low-allocation parsing and writing of fixed-width (flat) files for .NET. Attribute-driven column mapping, sync/async batch reading (IEnumerable/IAsyncEnumerable), configurable formatting,... More information

Async query-result cache primitives (in-process LRU or any HybridCache, per-item expiry, single-flight, tag invalidation) shared by QueryCache.EFCore and QueryCache.Dapper.

Cache Entity Framework Core query results in-process or in any HybridCache, with IQueryable extensions (ToListCachedAsync, FirstOrDefaultCachedAsync, SumCachedAsync, ...).

Cache Dapper query results in-process or in any HybridCache, keyed by SQL text, parameter values and connection string.