DateTime.AddDays() Method in C#
This method is used to return a new DateTime that adds the specified number of days to the value of this instance.
public DateTime AddDays (double value);
Here, the value is the number of whole and fractional days. The value parameter can be negative or positive.
Return Value: This method returns an object whose value is the sum of the date and time represented by this instance and the number of days represented by value.
Exception: This method will give ArgumentOutOfRangeException if the resulting DateTime is less than MinValue or greater than MaxValue.
Below programs illustrate the use of DateTime.AddDays(Double) Method:
DateTime before operation: 2010 January 01 DateTime after operation: 2010 February 06
Example 2: For ArgumentOutOfRangeException
DateTime before operation: 9999 December 31 The resulting DateTime is greater than the DateTime.MaxValue Exception Thrown: System.ArgumentOutOfRangeException
- This method does not change the value of this DateTime. Instead, it returns a new DateTime whose value is the result of this operation.
- The fractional part of the value is the fractional part of a minute. For example, 7.5 is equivalent to 7 minutes, 30 seconds, 0 milliseconds, and 0 ticks.
- The value parameter is rounded to the nearest millisecond.