Top 20 NuGet configuration Packages

Configucius is a simple netstandard20 based configuration reader
Tools for c# development
Replace placeholders from appsettings files with values loaded from environment variables.
Helper classes to make it easier to work with config files in .net. Supports using web.config, app.config, and Windows registry for configuration. Json support is available in the ConfigWrapper.Json package.
Consul configuration provider implementation for Microsoft.Extensions.Configuration.
Xamarin Yaml Settings
Provides you with a fluent interface for configuring an NServiceBus endpoint in .NET Core WebApi. It uses IServiceCollection as a starting point and guides the developer through the configuration process.
Provides you with a fluent interface for configuring an NServiceBus endpoint in .NET Core. It uses a class called ConfigureNServiceBus as a starting point and guides the developer through the configuration process.
Legacy configuration (app.config, web.config) provider implementation for Microsoft.Extensions.Configuration.
External code for configurable resources.
A framework for reading ServiceFabric configuration in a convenient and safe way
with this mini tool you can easily read and write your app configurations
Configuration extensions for Chakra.Core
Component Parameterisation for C#
A basic key/value Configuration Builder for the .Net Framework that draws single values from plain text files using the filename as the key.
Reduces dependencies.
This library provides a way to add in-memory JSON to a ConfigurationBuilder. It allows for remote web configuration loading as well as grabbing JSON from command line, environment variables, or any location that isn't a physical path located on the target machine.
for scf labeled usage