Interlocked.Increment Method (Int64)


Increments a specified variable and stores the result, as an atomic operation.

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

public static long Increment(
	ref long location


Type: System.Int64

The variable whose value is to be incremented.

Return Value

Type: System.Int64

The incremented value.

Exception Condition

The address of location is a null pointer.

This method handles an overflow condition by wrapping: if location = Int64.MaxValue, location + 1 = Int64.MinValue. No exception is thrown.

The Read method and the 64-bit overloads of the Increment, Decrement, and Add methods are truly atomic only on systems where a System.IntPtr is 64 bits long. On other systems, these methods are atomic with respect to each other, but not with respect to other means of accessing the data. Thus, to be thread safe on 32-bit systems, any access to a 64-bit value must be made through the members of the Interlocked class.

Universal Windows Platform
Available since 4.5
.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
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