DateTimeOffset.AddDays() Method in C#

The DateTimeOffset.AddDays() method in C# is used to return a new DateTimeOffset object that adds a specified number of whole and fractional days to the value of this instance.

Syntax

Following is the syntax −

public DateTimeOffset AddDays (double val);

Above, Val is the number of days to be added. To subtract, include a negative value.

Example

Let us now see an example to implement the DateTimeOffset.AddDays() method −

using System;
public class Demo {
   public static void Main() {
      DateTimeOffset dateTimeOffset = new DateTimeOffset(2019, 10, 10, 9, 15, 0, new TimeSpan(-5, 0, 0));
      DateTimeOffset res = dateTimeOffset.AddDays(20);
      Console.WriteLine("DateTimeOffset = {0}", res);
   }
}

Output

This will produce the following output −

DateTimeOffset = 10/30/2019 9:15:00 AM -05:00

Example

Let us now see another example to implement the DateTimeOffset.AddDays() method −

using System;
public class Demo {
   public static void Main() {
      DateTimeOffset dateTimeOffset = new DateTimeOffset(2019, 10, 10, 9, 15, 0, new TimeSpan(-5, 0, 0));
      DateTimeOffset res = dateTimeOffset.AddDays(-5);
      Console.WriteLine("DateTimeOffset (after subtracting days) = {0}", res);
   }
}

Output

This will produce the following output −

DateTimeOffset (after subtracting days) = 10/5/2019 9:15:00 AM -05:00