Top 20 NuGet interface Packages

Library of base Windows Form and WPF Window extensions and dialogs, including those needed for implementing role-based security inside a Windows application.
A Lightweight Duck Casting Framework for dynamic C#
XML XSerializer's XML serialization handles properties and types that the System.Xml.Serialization.XmlSerializer does not handle, such as interfaces and dictionaries. It is meant to be a drop-in replacement for the BCL XmlSerializer - it uses the same attributes: [XmlElement], [XmlAttribute], etc. ...
A SpecFlow bindings library for the Dynamics 365 Unified Interface.
Lightweight runtime interface implementation or handling for .NET standard
Biblioteca de interfaces de aplicação e infraestrutura e outros itens de domínio.
Provides core types and functionality to implement applications using the Flux architecture with .NET.
Wrapper for command line interface executables
A light abstraction around Dapper and Dapper.Contrib that also maintains the behavior IDbConnection. This library facilitates a loosely coupled design and unit testing.
Generic base interfaces needed for implementing a very basic repository pattern in your project.
Abstract base class for PostgreSQL repositories.
C.R.O.W. is a widget toolkit and rendering engine entirely developed in C# with templates, styles, compositing, and bindings.
Abstract MongoDB repository base class.
[DEPRECATED] The Client Interface API for use with the Diffusion family of products. This package will not receive updates apart from bugfixes. Use the new Diffusion.Client (https://www.nuget.org/packages/Diffusion.Client/) package instead.
C.R.O.W. is a widget toolkit and rendering engine entirely developed in C# with templates, styles, compositing, and bindings. Crow.OpenTK is the OpenTK ready version.
Core classes for Dynamics 365 UI test automation.
Emulated Amazon Web Services (AWS) Simple Storage Service (S3) server-side interface.
It hides DateTime under interface so it can be used in the unit tests and it tears dependency on the DateTime.Now
Creates an RPC client based on an interface
Mailgun Email Sender API Wrapper for ASP.NET Core apps With this useful service you can send email through Mailgun. API Key and other params are set in the sender class constructor. Intended use is within ASP.NET Core apps using MVC; inject the service into the DI container (inside Startup.cs use ...