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Interlocked.Add Method (Int32%, Int32)

Adds two 32-bit integers and replaces the first integer with the sum, as an atomic operation.

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

public static int Add(
	ref int location1,
	int value
)

Parameters

location1
Type: System.Int32%
A variable that contains the first value to be added. The sum of the two values is stored in location1.
value
Type: System.Int32
The value to be added to the integer at location1.

Return Value

Type: System.Int32
The new value stored at location1.

ExceptionCondition
NullReferenceException

The address of location1 is a null pointer.

This method handles an overflow condition by wrapping: If the value at location1 is Int32.MaxValue and value is 1, the result is Int32.MinValue; if value is 2, the result is (Int32.MinValue + 1); and so on. No exception is thrown.

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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