How to compare Lists in Unit Testing

Question

How can this test fail?

[TestMethod]
public void Get_Code()
{
    var expected = new List();
    expected.A         


        

Answer 1

List adminDetailsExpected = new List()
{
new AdminUser  {firstName = "test1" , lastName = "test1" , userId = 
"001test1"  },
new AdminUser {firstName = "test2" , lastName = "test2" , userId = 
"002test2"   }
};

//Act

List adminDetailsActual = RetrieveAdmin(); // your retrieve logic goes here

//Assert

Assert.AreEqual(adminDetailsExpected.Count, adminDetailsActual.Count);  //Test succeeds if the count matches else fails. This count can be used as a work around to test