Top 20 NuGet configuration Packages

This client library enables configuration builder for .Net Framework in .config file with json sources: network shared file and json content from URL (both web API and cloud storage, e.g. Azure Blob)
Extension for including Microsoft.Extension.Configuration in the Puffix IoC library.
Extension methods for providing substitution and prefixing support to IConfiguration.
AWS Systems Manager Parameter Store configuration provider implementation for Microsoft.Extensions.Configuration.
.NET Core configuration provider for Docker Secrets.
nJupiter.Configuration is a lightweight component for easy management of XML configuration files. It makes it easy to fast add different configurations for your assemblies and components. It automatically adds file watchers to local files so configuration can be updated without restarting the applic...
Create strongly typed .NET classes to define configuration data and persist it into a variety of configuration stores. Store config data in .config files, different .config sections and external files, plain xml files, strings or database tables. Read and write configuration data, always have defaul...
A simple configuration library for .NET
Collection of simple pieces of reusable code designed such that dependencies aren't forced upon consumers of its packages. Package is shipped as source code.
JSON configuration provider implementation for Microsoft.Extensions.Configuration.
Remote configuration provider implementation to use with Microsoft.Extensions.Configuration for loading settings from a remote source
Library containing DynamicConfigurableTypeLoader class, which dynamically loads and instantiates types using information in Microsoft.Extensions.Configuration.IConfiguration object.
.NET Configuration Extensions for loading configuration files from AWS S3.
Provides application configuration support.
Use your own class object to easily load and save configuration settings to App/Web/Custom .config or .xml file. if the .xml file or your custom.config file doesn't exist it will be created.
Type-safe, convention-over-configuration access to the .Net application configuration, web.config, or other configuration source.
.Net library to simplify cryptography in so developers will actually use it
The Windows Azure Configuration Extensions enhance the Enterprise Library configuration subsystem by providing additional configuration sources. The Blob Configuration Source is included. These extensions are a part of the Enterprise Library Integration Pack for Windows Azure.
A feature flipper. FlipIt provides a simple and flexible way to flip features in a .NET application.
A library that makes it easy to register routes through the .NET configuration files. Supports page routes, MVC, custom routes (IRouteHandler and RouteBase), constraints (RegEx and IRouteConstraint), defaults, parameters and tokens. Written in C# for .NET 4.