Requests that the system call the finalizer for the specified object for which SuppressFinalize has previously been called.
mscorlib (in mscorlib.dll)
Public Shared Sub ReRegisterForFinalize (
obj As Object
The object that a finalizer must be called for.
The ReRegisterForFinalize method adds the obj parameter to the list of objects that request finalization before the garbage collector frees the object. The obj parameter must be the caller of this method.
Calling the ReRegisterForFinalize method does not guarantee that the garbage collector will call an object's finalizer.
By default, all objects that implement finalizers are added to the list of objects that require finalization; however, an object might have already been finalized or might have disabled finalization by calling the SuppressFinalize method.
A finalizer can use this method to resurrect itself or an object that it references.
The following example demonstrates how to use the ReRegisterForFinalize method to finalize an object a second time after garbage collection.
Shared Sub Main()
'Create a MyFinalizeObject.
Dim mfo As New MyFinalizeObject()
'Release the reference to mfo.
mfo = Nothing
'Force a garbage collection.
'At this point mfo will have gone through the first Finalize.
'There should now be a reference to mfo in the static
'MyFinalizeObject.currentInstance field. Setting this value
'to null and forcing another garbage collection will now
'cause the object to Finalize permanently.
MyFinalizeObject.currentInstance = Nothing
Public Shared currentInstance As MyFinalizeObject = Nothing
Private hasFinalized As Boolean = False
Protected Overrides Sub Finalize()
If hasFinalized = False Then
'Put this object back into a root by creating
'a reference to it.
MyFinalizeObject.currentInstance = Me
'Indicate that this instance has finalized once.
hasFinalized = True
'Place a reference to this object back in the
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Available since 4.5.NET Framework
Available since 1.1Portable Class Library
Supported in: portable .NET platformsSilverlight
Available since 2.0Windows Phone Silverlight
Available since 7.0Windows Phone
Available since 8.1