SafeHandle::DangerousAddRef Method
Manually increments the reference counter on SafeHandle instances.
Assembly: mscorlib (in mscorlib.dll)
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: |
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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. |
- SecurityPermission
for permission to call unmanaged code. Security action: LinkDemand. Associated enumeration: SecurityPermissionFlag::UnmanagedCode
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Caution: