Top 20 NuGet argument Packages

Catel.Core library.
Terse syntax C# command line parser for .NET. For FSharp support see CommandLineParser.FSharp. The Command Line Parser Library offers to CLR applications a clean and concise API for manipulating command line arguments and related tasks.
Argument validation made simple and unified. It ensures arguments conforms to simple validation rules and provides an uniformed exception throwing strategy if arguments are invalid.
Cauldron.Consoles is a Cauldron.Core based parameter parser which supports grouping of parameters in execution groups. It is also supports localization and has a nice parameter table :)
A declarative command line and XML configuration parser for F# applications.
Just a quick way to create your own command line tool.
AtleX.CommandLineArguments is a helper library to facilitate parsing command line arguments into a strongly-typed object. Values can be validated with extensible and customisable validators and the library can automatically generate help for the user.
ArgSentry is a utility class for validating method argument values.
Validates parameters.
NClap is a .NET library for parsing command-line arguments and building interactive command shells. It's driven by a declarative attribute syntax, and easy to extend.
Model your command line application interface in a class
Command-line argument parser.
A simple guard library for validating method parameters without being a complete validation library. This library makes it easy to validate method arguments in a uniform way.
Ensure.Net is a null checker library for .NET
CuttingEdge.Conditions is a library that helps developers to write fluent pre and postcondition validations in their C# 3.0 and VB.NET 9.0 code base. Writing these validations is easy and it improves the readability and maintainability of code.
Lightweight and Composable CLI Argument Parser for all modern .Net platforms
Argument validation methods, for example: this.user = Argument.NotNull("user", user). Less fancy than approaches based on lambdas/anonymous classes, but less scary performance-wise (given that argument checks are often all over the place). Includes Code Contracts [ContractArgumentValidator] annota...
Terse syntax C# command line parser for .NET with F# support. The Command Line Parser Library offers to CLR applications a clean and concise API for manipulating command line arguments and related tasks.
Easy to write, easy to read guard clauses for your .NET methods.
docopt.net is the .net version of the docopt python beautiful command line parser. docopt.net helps you define an interface for your command-line app, and automatically generate a parser for it. docopt.net is based on conventions that have been used for decades in help messages and man pages for pr...