C# LINQ - OrderBy vs OrderByDescending

var dates = new DateTime[] {

        new DateTime(2015, 2, 15),

        new DateTime(2015, 3, 25),

        new DateTime(2015, 1, 5)

    };

var ResultOrderBy = dates.OrderBy(d => d);

var ResultOrderByDescending = dates.OrderByDescending(d => d);

foreach (DateTime dt in ResultOrderBy)

    Console.WriteLine(dt);

//Output

//1/5/2015 12:00:00 AM

//2/15/2015 12:00:00 AM

//3/25/2015 12:00:00 AM

foreach (DateTime dt in ResultOrderByDescending)

    Console.WriteLine(dt);

//Output

//3/25/2015 12:00:00 AM

//2/15/2015 12:00:00 AM

//1/5/2015 12:00:00 AM

//DateTime
//OrderByDesc
//New - Old
//First - Last