DateTimeExtensions

DateTimeExtensions.cs

    public static class DateTimeExtensions
    {
        public static DateTime TrimMilliseconds(this DateTime date)
        {
            return date.AddMilliseconds(-date.Millisecond);
        }
    }

    [TestClass]
    public class DateTimeExtensionsTest
    {

        [TestMethod]
        public void CanTrimMilliseconds()
        {
            var date1 = new DateTime(1,1,1, 1,1,1).AddMilliseconds(1);
            var date2 = new DateTime(1, 1, 1, 1, 1, 1).AddMilliseconds(2);

            Assert.AreNotEqual(date1, date2);
            Assert.AreEqual(date1.TrimMilliseconds(), date2.TrimMilliseconds());
        }
    }