Below are the facts on Finalize() method.
· Destructors are the C# mechanism for performing cleanup operations. Destructors provide appropriate safeguards, such as automatically calling the base type's destructor.
· In C# code, Object.Finalize cannot be called explicitly or overridden. All you can do is implement a destructor. And note, when the C# compiler compiles a destructor, it implicitly translates the destructor code to the equivalent of a Finalize() method that ensures the Finalize() method of the parent class is executed.
· This method is automatically called after an object becomes inaccessible, unless the object has been exempted from finalization by a call to SuppressFinalize.
· Finalize is automatically called only once on a given instance, unless the object is re-registered using a mechanism such as ReRegisterForFinalize and GC.SuppressFinalize has not been subsequently called.
- Every implementation of Finalize in a derived type must call its base type's implementation of Finalize.
- A type must implement Finalize when it uses unmanaged resources such as file handles or database connections that must be released when the managed object that uses them is reclaimed.
· Finalize operations have the following limitations:
· The exact time when the finalizer executes during garbage collection is undefined.
· The finalizers of two objects are not guaranteed to run in any specific order, even if one object refers to the other. That is, if Object A has a reference to Object B and both have finalizers, Object B might have already finalized when the finalizer of Object A starts.
· The thread on which the finalizer is run is unspecified.
· Resources are not guaranteed to be released at any specific time, unless calling a Close method or a Dispose method.
· The Finalize method might not run to completion or might not run at all in the following exceptional circumstances:
o Another finalizer blocks indefinitely (goes into an infinite loop, tries to obtain a lock it can never obtain and so on). Because the runtime attempts to run finalizers to completion, other finalizers might not be called if a finalizer blocks indefinitely.
o The process terminates without giving the runtime a chance to clean up. In this case, the runtime's first notification of process termination is a DLL_PROCESS_DETACH notification.
Regards
Arun.
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