NUnit.Mocks was originally developed for internal use in NUnit's own tests, although we no longer use it for that purpose. In addition, it has been useful as a teaching tool, allowing users to gain familiarity with mocking techniques before moving on to more serious frameworks. For production use, we recommend you install a full-featured mock object framework. The NUnit project now uses NSubstitute and NUnit.Mocks is no longer being developed.
$ dotnet add package NUnit.MocksNo README available.