Adds a specified number of whole and fractional hours to the current DateTimeOffset object.
Assembly: mscorlib (in mscorlib.dll)
- Type: System.Double
A number of whole and fractional hours. The number can be negative or positive.
The fractional part of the hours parameter is the fractional part of an hour. For example, 4.5 is equivalent to 4 hours, 30 minutes, 0 seconds, 0 milliseconds. The hours parameter is rounded to the nearest millisecond.
This method returns a new DateTimeOffset object. It does not modify the value of the current object by adding hours to its date and time.
Because a DateTimeOffset object does not represent the date and time in a specific time zone, the method does not consider a particular time zone's adjustment rules when it performs date and time arithmetic.
Converting time intervals of less than an hour to a fraction can involve a loss of precision. (For example, one minute is 0.01666 of an hour.) If this is problematic, you can use the Add method, which enables you to specify more than one kind of time interval in a single method call and eliminates the need to convert time intervals to fractional parts of an hour.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)