Configures and runs NUnit - JVM-style attribute-driven .NET test framework with `[Test]` / `[TestCase]` / `[TestCaseSource]` / `[Values]` / `[Random]` parametrize attributes; `[SetUp]` / `[TearDown]` / `[OneTimeSetUp]` / `[OneTimeTearDown]` lifecycle; categories for selective runs; constraint-model assertion API (`Assert.That(actual, Is.EqualTo(expected))`); parameterized fixtures via `[TestFixture]` typed args. Use when working with .NET on a NUnit codebase or preferring constraint-model assertions over xUnit's classic style.