Windows apps
Collapse the table of content
Expand the table of content
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

TimeSpan.Addition Operator (TimeSpan, TimeSpan)


The .NET API Reference documentation has a new home. Visit the .NET API Browser on to see the new experience.


Adds two specified TimeSpan instances.

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

public static TimeSpan operator +(
	TimeSpan t1,
	TimeSpan t2


Type: System.TimeSpan

The first time interval to add.

Type: System.TimeSpan

The second time interval to add.

Return Value

Type: System.TimeSpan

An object whose value is the sum of the values of t1 and t2.

Exception Condition

The resulting TimeSpan is less than MinValue or greater than MaxValue.

The Addition method defines the addition operator for TimeSpan values. It enables code such as the following:

TimeSpan time1 = new TimeSpan(1, 0, 0, 0);   // TimeSpan equivalent to 1 day.
TimeSpan time2 = new TimeSpan(12, 0, 0);     // TimeSpan equivalent to 1/2 day.
TimeSpan time3 = time1 + time2;              // Add the two time spans.

Console.WriteLine("  {0,12}\n +  {1,10}\n   {3}\n    {2,10}", 
                  time1, time2, time3, new String('_', 10));
// The example displays the following output:
//           1.00:00:00
//        +    12:00:00
//          __________
//           1.12:00:00

Languages that do not support custom operators can call the Add method instead.

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Return to top
© 2018 Microsoft