Top 20 NuGet appconfig Packages

This is the Microsoft Azure Application Configuration Service client library
Introducing AWS AppConfig, a new service that enables customers to quickly deploy validated configurations to applications of any size in a controlled and monitored fashion.
Microsoft.Extensions.Configuration.AzureAppConfiguration is a configuration provider for the .NET Core framework that allows developers to use Microsoft Azure App Configuration service as a configuration source in their applications.
Microsoft.Azure.AppConfiguration.AspNetCore allows developers to use Microsoft Azure App Configuration service as a configuration source in their applications. This package adds additional features for ASP.NET Core applications to the existing package Microsoft.Extensions.Configuration.AzureAppConfi...
F# Libary for managing configuration data from environment variables and application config in a type-safe way
Injects values into config files directly or via environment variables. Can inject app settings, connection strings, or WCF client endpoints.
Mimick AppConfig adds support for configuration sources from standard or custom application configuration files.
AppSettings class mapper.
Config plugin to Xamarin.Forms, Xamarin.Android and Xamarin.iOS applications.
Adds DataObjects.Net configuration template and configuration file schema
DotNet Development Utilities. Autoreader AppConfig file.
A Photon plugin for modifying and transforming VS App/Web config files.
Extensions for configuration
Allows to generate app.config file from configuration class
Configuration service for .NET Apps.
Collection of classes to help retrieve settings from App.config files in .NET.
This solution assigned for easy development of any application by ASP NetCore EntityFramework in one-context SQL infrastructure. See GitHub.
SimplifiedConfiguration makes it a breeze to read the config file settings. It's APIs makes it unnecessary to specify the app settings key and rather derive the key from the property name.
.Net Dev Utils
A lightweight library to load application configuration settings into a dictionary.