// outputting today's date formatted as dd/mm/yyyy
Console.WriteLine(DateTime.Now.ToString("dd/MM/yyyy"));

// creating a DateTime object
DateTime miyazakiBirthDate = new DateTime(1941, 1, 5);
Console.WriteLine(miyazakiBirthDate.ToString("dd/MM/yyyy"));

// example of DateTime arithmethic operation
TimeSpan oneDay = new TimeSpan(1, 0, 0, 0);
DateTime miyazakiBirthNextDay = miyazakiBirthDate + oneDay;
Console.WriteLine(miyazakiBirthNextDay.ToString("dd/MM/yyyy"));

// another way to output a formatted DateTime
Console.WriteLine(string.Format("{0:MM/dd/yyy}", miyazakiBirthDate));

Basic examples on the usage of the DateTime objects.

.NET - C# - DateTime - Basics

Net, c#

C#