CODEWITHSUNDEEP
c#
LCJ
LCJ

Reputation: 22652

Using AddTicks does not cause difference to DateTime

I have following code for AddTicks method. Ticks property of datetime object is returning same value before and after the AddTick method. Why is it behaving so?

There are 10,000 ticks in a millisecond.

Ticks: The value of this property represents the number of 100-nanosecond intervals that have elapsed since 12:00:00 midnight, January 1, 0001, which represents DateTime.MinValue.

AddTicks : Adds the specified number of ticks to the value of this instance.

Note: I am using .Net 4.0 framework

CODE

    static void Main()
    {


        DateTime dt2 = new DateTime(2010, 5, 7, 10, 11, 12, 222);

        long x = dt2.Ticks;
        dt2.AddTicks(9999);

        long y = dt2.Ticks;

        bool isSame = false;
        if (x == y)
        {
            isSame = true;  
        }


        Console.WriteLine(isSame);
        System.Console.ReadKey();
    }

Upvotes: 6

Views: 5142

Answers (2)

faester
faester

Reputation: 15076

AddTicks (and the other Add* methods) does not alter the DateTime, but returns a new object.

So you should use 

dt2 = dt2.AddTicks(...)

DateTime is a value type and is immutable.

Upvotes: 21

Peregrine
Peregrine

Reputation: 4546

DateTime values (like strings) are immutable.

Any operation on a DateTime instance won't change the value of that instance, but instead will return a new DateTime value that you have to capture.

dt2 = dt2.AddTicks(9999);

Upvotes: 3

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