using NUnit.Framework; using System.Collections.Generic; [TestFixture] public class CollectionAssertTests { [Test] public void TestAreNotEquivalent() { ListIn the above code, we first declare two lists, list1 and list2, with different element orders. We then use the AreNotEquivalent method of CollectionAssert to assert that these lists are not equivalent. The CollectionAssert class is part of the NUnit package library and can be installed using the NuGet package manager.list1 = new List { 1, 2, 3 }; List list2 = new List { 1, 3, 2 }; CollectionAssert.AreNotEquivalent(list1, list2); } }