Get Date Difference in C#

Suppose you are working with Date in C#. In that case, there is a possibility you might need to get the difference between two dates in C#, so in this article, I have mentioned how we can find the difference between 2 dates in C# using the Console application.

Using Subtract(-) Operator Method

using System;

namespace CsharpGetDateDifference
{
    internal class Program
    {
        static void Main(string[] args)
        {
            DateTime pastDate = Convert.ToDateTime("20/06/2022");
            DateTime TodayDate = DateTime.Now; // current date is 28/10/2022

            var numberOfDays = (TodayDate - pastDate).Days;
            var daysInDouble = (TodayDate - pastDate).TotalDays;

            Console.WriteLine("Number of days passed after 20/06/2022: " + numberOfDays);
            Console.WriteLine("Number of days in double, passed after 20/06/2022: " + daysInDouble);
        }
    }
}

Output:

Number of days passed after 20/06/2022: 130
Number of days in double, passed after 20/06/2022: 130.85971650194443

In the above code, I have simply used '-' operator to subtract pastDate from todayDate so we can get total number of days passed.

When we are using '.Days', it returns total days completed in int, while when we are using '.TotalDays' it returns days as double value.

Using DateTime.Subtract() Method

As you can see in the above method we used '-' operator, but instead of using it we can also use DateTime.Subtract() Method in C#, so if we change above example code, it would be as below

using System;

namespace CsharpGetDateDifference
{
    internal class Program
    {
        static void Main(string[] args)
        {
            DateTime pastDate = Convert.ToDateTime("20/06/2022");
            DateTime TodayDate = DateTime.Now; // current date is 28/10/2022

            //using .Subtract Method
            var numberOfDays = TodayDate.Subtract(pastDate).Days;
            var daysInDouble = TodayDate.Subtract(pastDate).TotalDays;

            Console.WriteLine("Number of days passed after 20/06/2022: " + numberOfDays);
            Console.WriteLine("Number of days in double, passed after 20/06/2022: " + daysInDouble);
        }
    }
}

Output is same as above

Number of days passed after 20/06/2022: 130
Number of days in double, passed after 20/06/2022: 130.86626161037154

If you want to subtract time from any datetime value, then also you can use DateTime.Subtract() as DateTime.Subtract(TimeSpan) returns a new DateTime that subtracts the specified time interval (TimeSpan value) from the current instance.

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