ListIn this example, we create two lists of integers, and then use the Intersect method to find the elements that are common to both lists. The resulting collection is then printed out using a foreach loop. The NUnit.Framework package library provides various classes and methods for unit testing in C#. This includes the List Intersect method, which can be used to test code functionality that requires comparing two lists and finding the common elements.list1 = new List () { 1, 2, 3, 4 }; List list2 = new List () { 3, 4, 5, 6 }; var commonElements = list1.Intersect(list2); foreach (var element in commonElements) { Console.WriteLine(element); }