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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
)
public static long Increment (
	/** @ref */ long location
)
Not applicable.

Parameters

location

The variable whose value is to be incremented.

Return Value

The incremented value.

Exception typeCondition

NullReferenceException

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.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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