using System;

class MainClass {

    public static void Main() {

        Console.WriteLine("DateTime.Now = " + DateTime.Now);
        Console.WriteLine("DateTime.UtcNow = " + DateTime.UtcNow);
        DateTime myDateTime = DateTime.Now;
        Console.WriteLine("myDateTime = " + myDateTime);
        DateTime myDateTime2 = DateTime.UtcNow;
        Console.WriteLine("myDateTime = " + myDateTime);
    }
}

    

   
 

using System;

class MainClass {
    public static void DisplayDateTime(string name, DateTime myDateTime) {
        Console.WriteLine(name + " = " + myDateTime);
        Console.WriteLine(name + ".Year = " + myDateTime.Year);
        Console.WriteLine(name + ".Month = " + myDateTime.Month);
        Console.WriteLine(name + ".Day = " + myDateTime.Day);
        Console.WriteLine(name + ".Hour = " + myDateTime.Hour);
        Console.WriteLine(name + ".Minute = " + myDateTime.Minute);
        Console.WriteLine(name + ".Second = " + myDateTime.Second);
        Console.WriteLine(name + ".Millisecond = " + myDateTime.Millisecond);
        Console.WriteLine(name + ".Ticks = " + myDateTime.Ticks);
    }
    public static void Main() {
        int year = 2008;
        int month = 8;
        int day = 25;
        DateTime myDateTime = new DateTime(year, month, day);

        int hour = 23;
        int minute = 30;
        int second = 12;
        int millisecond = 5;
        DateTime myDateTime2 = new DateTime(year, month, day, hour, minute, second, millisecond);

        System.Globalization.JulianCalendar myCalendar = new System.Globalization.JulianCalendar();
        DateTime myDateTime3 = new DateTime(year, month, day, myCalendar);

        DateTime myDateTime4 = new DateTime(0);

        DisplayDateTime("myDateTime", myDateTime);
        DisplayDateTime("myDateTime2", myDateTime2);
        DisplayDateTime("myDateTime3", myDateTime3);
        DisplayDateTime("myDateTime4", myDateTime4);

        TimeSpan myTimeSpan = new TimeSpan(4, 12, 10);
        myDateTime4 += myTimeSpan;
        DisplayDateTime("myDateTime4", myDateTime4);

    }

}

    

   
 
using System;
public class MainClass {
    public static void Main() {

        DateTimeOffset local = DateTimeOffset.Now;
        DateTimeOffset utc = local.ToUniversalTime();

        Console.WriteLine(local.Offset);   // -06:00:00 (in Central America)
        Console.WriteLine(utc.Offset);     // 00:00:00

        Console.WriteLine(local == utc);                 // True
        //To include the Offset in the comparison, you must use the EqualsExact method:
        Console.WriteLine(local.EqualsExact(utc));      // False
    }
}

    

   
 

using System;
public class MainClass {
    public static void Main() {

        DateTime d = new DateTime(2000, 12, 12);
        DateTime utc = DateTime.SpecifyKind(d, DateTimeKind.Utc);
        Console.WriteLine(utc);
    }
}

    

   
 

using System;
using System.Globalization;
class MainClass {
    public static void Main() {
        DateTime dt = new DateTime(1900, 2, 29, new JulianCalendar());
    }
}

    

   
 


    using System;
    class MainClass
    {
        public static void Main()
        {

            DateTime dt = new DateTime(1900, 2, 29);
       }
    }

    

   
 

using System;
    class MainClass
    {
        public static void Main()
        {
            TimeSpan timespan1 = new TimeSpan(2, 12, 0, 0);
            TimeSpan timespan2 = new TimeSpan(4, 12, 0, 0);

            TimeSpan oneWeek = timespan1 + timespan2;

            DateTime now = DateTime.Now;

            DateTime past = now - oneWeek;

            DateTime future = now + oneWeek;

            Console.WriteLine("Now   : {0}", now);
            Console.WriteLine("Past  : {0}", past);
            Console.WriteLine("Future: {0}", future); 

       }
    }