Nunit currently has two styles of writing test.
Classic style
Assert.AreEqual(x, y);
New Style
Assert.That(y, Is.EqualTo(x);
The Release notes for NUnit 2.9.3 (Scroll down!) says
Support for old style tests has been removed
Do they mean the Classic style is removed?
It is not removed in v3. Looking at the latest alpha 2 we can see that the methods
Are*
still exist in theAssert
object egOld style tests is the prefixing of tests with "Test" (see also this launchpad)