Top 20 NuGet fixed Packages

Open Source library for automatic formatted file read/write operations www.filehelpers.net
FluentFiles is a library for reading and writing fixed-width or delimited text files.
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.
An extension for the FluentFiles.FixedLength package that enables attribute-based configuration.
A library for reading and writing fixed-width field text files.
The core library for FluentFiles.*.Attributes packages.
The core library for FluentFiles. FluentFiles is a library for reading and writing fixed-width or delimited text files.
Provides additional field converters for FluentFiles.
A mobile-first CSS framework that supports responsive mobile first and fixed desktop layouts.
Class library with specialized collections to model graphs, queues, multi-value dictionaries and such.
FlatFile is fast-working open-source library for reading/writing plain files
Fixed Width Parser Writer for reading and writing flat data (files) with defined field position in line or file (relative height).
Class library for working with common data formats and files and mapping them to and from C# objects.
FlatFile.FixedLength is fast-working open-source library for reading/writing fixed-length plain files
Core library for FlatFile.[name].Attributes assemblies
Core library for FlatFile assemblies
A .NET port of BeanIO which perfectly fits into the .NET world.
.Net Library to read from fixed width or delimiter separated file using strongly typed objects. Example: pipe delimited, csv, etc.
Readers and writers for CSV and fixed-length file formats. Supports both synchronous and asynchronous operation, data annotations, and wicked fast object serialization.
Open Source library for automatic formatted file read/write operations www.filehelpers.net. Unofficial .NET Standard 2.0 / .NET Core port.