Top 20 NuGet flat Packages

Open Source library for automatic formatted file read/write operations www.filehelpers.net
Reads and writes CSV, fixed-length and other flat file formats with a focus on schema definition, configuration and speed. Supports mapping directly between files and classes.
ETL Framework for .NET
JSON extension to Cinchoo ETL framework
An ETL framework for .NET
Simple JSON flat file data store
FluentFiles.FixedLength.Attributes is extension for FluentFiles.FixedLength package for attribute-based mapping
FluentFiles.Delimited.Attributes is extension for FluentFiles.Delimited package for attribute-based mapping
FluentFiles is fast-working open-source library for reading/writing plain files
FlatFile.FixedLength.Attributes is extension for FlatFile.FixedLength package for attribute-based mapping
FlatFile.Delimited.Attributes is extension for FlatFile.Delimited package for attribute-based mapping
FlatFile is fast-working open-source library for reading/writing plain files
Flat binding library for Bridge.NET projects.
FluentFiles.FixedLength is fast-working open-source library for reading/writing fixed-length plain files
FluentFiles.Delimited is fast-working open-source library for delimited plain files such as cvs and etc.
Core library for FluentFiles.[name].Attributes assemblies
Core library for FlatFile.[name].Attributes assemblies
FlatFile.Delimited is fast-working open-source library for delimeted plain files such as cvs and etc.
FlatFile.FixedLength is fast-working open-source library for reading/writing fixed-length plain files
Core library for FluentFiles assemblies