Export (0) Print
Expand All

SafeHandle.DangerousAddRef Method

Manually increments the reference counter on SafeHandle instances.

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

public void DangerousAddRef(
	ref bool success
)

Parameters

success
Type: System.Boolean%
true if the reference counter was successfully incremented; otherwise, false.

The DangerousAddRef method prevents the common language runtime from reclaiming memory used by a handle (which occurs when the runtime calls the ReleaseHandle method). You can use this method to manually increment the reference count on a SafeHandle instance. DangerousAddRef returns a Boolean value using a ref parameter (success) that indicates whether the reference count was incremented successfully. This allows your program logic to back out in case of failure. You should set success to false before calling DangerousAddRef. If success is true, avoid resource leaks by matching the call to DangerousAddRef with a corresponding call to DangerousRelease.

Caution noteCaution

This method is intended for advanced users and must always be used carefully. To avoid leaking handle resources, always call this method inside a constrained execution region (CER), where a thread abort cannot interrupt processing.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Community Additions

ADD
Show:
© 2015 Microsoft