System.Linq.Tests.WhereTests.SameResultsRepeatCallsStringQuery C# (CSharp) Method

        public void SameResultsRepeatCallsStringQuery()
        {
            var q = from x in new[] { "!@#$%^", "C", "AAA", "", "Calling Twice", null, "SoS", String.Empty }
                    select x;

            Assert.Equal(q.Where(string.IsNullOrEmpty), q.Where(string.IsNullOrEmpty));

        }