Top 20 NuGet parameter Packages

Lightweight Runtime-Only Contracts for .Net Standard 2.0. Focus lies on Readability and Extensibility. Under MIT License.
Simple, yet powerful, strongly typed command line arguments parser library for .NET.
This analyzer organizes ctor/method parameters, so every parameter is declared on its own line.
Adds ability to support aliases for model binding. Set action parameter to "product" and place "productid" on querystring. i.e. public ActionResult Index([Alias("pid"]Product product) ... add global filter ... filters.Add(new AliasInitializer());
Yet Another Command-Line Parser
Lightweight guard / pre-condition / parameter validation library for .NET
.NET Method parameter validation library
Basic Oracle provider for FluidDbClient.
This library is an extension for the validation of arguments and parameters.
Data provider for project's static data needs like continents, countries, cities, currencies, university
Rebinds parameters in an expression using a given map
A simple library containing all the handy helpers methods that you tend to rewrite.
Reflection Helper with Caching and Attribute support
Argument Assertions provides a fluent, simple and easy to use API for checking valid argument values with strong compile time type checks.
StaticDotNet.ParameterValidation is a fluent library to help easily and consistently validate parameters.
Lightweight and Composable CLI Argument Parser for all modern .Net platforms
Pass multiple arguments that can be complex objects to another program while executing that program from an executable file. After that, main program can communicate with another program that was executed.