System.Linq.Tests.AverageTests.NullableDecimalFromSelector C# (CSharp) Méthode

        public void NullableDecimalFromSelector()
        {
            var source = new[]
            {
                new{ name = "Tim", num = (decimal?)5.5m},
                new{ name = "John", num = (decimal?)15.5m},
                new{ name = "Bob", num = (decimal?)null}
            };
            decimal? expected = 10.5m;

            Assert.Equal(expected, source.AsQueryable().Average(e => e.num));
        }