System.Threading.Thread by: Microsoft

Provides the System.Threading.Thread class, which allows developers to create and control a thread, set its priority, and get its state. Commonly Used Types: System.Threading.Thread System.Threading.ThreadStart System.Threading.ParameterizedThreadStart When using NuGet 3.x this package requires at least version 3.4.

System.Threading.ThreadPool by: Microsoft

Provides the System.Threading.ThreadPool class, which contains a pool of threads that can be used to execute tasks, post work items, wait on behalf of other threads, and process timers. Commonly Used Types: System.Threading.ThreadPool System.Threading.WaitOrTimerCallback When using NuGet 3.x this package requires at least version 3.4.

xunit.extensibility.core by: James Newkirk Brad Wilson

Includes xunit.core.dll for extensibility purposes. Supports .NET 4.5.2 or later, and .NET Standard 1.1.