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DateTime.Addition Operator

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Adds a specified time interval to a specified date and time, yielding a new date and time.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public static DateTime operator +(
	DateTime d,
	TimeSpan t


Type: System.DateTime
The first object to add.
Type: System.TimeSpan
The second object to add.

Return Value

Type: System.DateTime
An object that is the sum of the values of d and t.


The resulting DateTime is earlier than DateTime.MinValue or later than DateTime.MaxValue.

The following example demonstrates the addition operator.

System.DateTime dTime = new System.DateTime(1980, 8, 5);

// tSpan is 17 days, 4 hours, 2 minutes and 1 second.
System.TimeSpan tSpan
   = new System.TimeSpan(17, 4, 2, 1);

// Result gets 8/22/1980 4:02:01 AM.
System.DateTime result = dTime + tSpan;

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone