Top 20 NuGet tests Packages

Restier is a framework for building convention-based, secure, queryable APIs with ASP.NET. This package contains tools to test Restier services in-memory without having to spin up a dedicated website or IIS. Commonly used types: Microsoft.Restier.Core.RestierController
Interfaces used to configure the TestHelper from other projects
Enumerations tests framework is provided as an NUnit based framework sufficient to exercise the majority of boilerplate issues concerning both Ordinal as well as Bitwise Enumerations.
FSec is a tool for automatically running security tests for .NET programs. The tool provides some basic security testing functionality to discover vulnerabilities in an application, including: XSS, XML Bomb, XPath injection, SQL injection, URL tampering, URL bogus, ...
ProSkive common library for tests
ProSkive common library for tests
Breakdance is a testing framework for managing the dangerous dance of shipping public APIs. This package in particular helps generate API reports for OData APIs, and compare them against a prior unit test run. That way, if something in the API surface changed, the unit test will fail.
Reposify EF Core implementation.
Easy to use, small, SignalR Core unit testing support with xUnit and Moq. Check my github for NUnit or MSTest version.
Seleniumplus is a C# .Net Core Selenium extension to make Web UI interactions easier like click in a html element or send text to a input text.
This library is designed to simplify testing applications created using the library MvvmFrame.Wpf
Provides realtime test monitoring functionality to NUnit using IPC/Named Pipes, Grpc, log files, or StdOut.