public void ContainsWorks()
{
_myArray = default;
#pragma warning disable xUnit2017 // Do not use Contains() to check if a value exists in a collection
Assert.False(_myArray.Contains(11));
_myArray.Add(12);
_myArray.Add(13);
Assert.True(_myArray.Contains(13));
#pragma warning restore xUnit2017 // Do not use Contains() to check if a value exists in a collection
}