System.Linq.Tests.SelectTests.ForcedToEnumeratorDoesntEnumerate C# (CSharp) Method

        public void ForcedToEnumeratorDoesntEnumerate()
        {
            var iterator = NumberRangeGuaranteedNotCollectionType(0, 3).Select(i => i);
            // Don't insist on this behaviour, but check it's correct if it happens
            var en = iterator as IEnumerator<int>;
            Assert.False(en != null && en.MoveNext());
        }