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Finalize vs Dispose


Why do some individuals prefer the Finalize approach to Dispose?

When would you prefer to use the Finalize method over the Dispose method, and when would you prefer to use the Dispose method over the Finalize method?

Asked by tush1r

Solution #1

When your object is garbage collected, the finalizer method is called, and you have no way of knowing when this will happen (you can force it, but it will hurt performance).

The Dispose function, on the other hand, is intended to be called by the code that generated your class in order to clear up and release any resources you’ve obtained (unmanaged data, database connections, file handles, and so on) once the code has finished with your object.

Implementing IDisposable and Dispose so that you can utilize your object in a using statement is normal practice. Using(var foo = new MyObject()) is an example. And, just in case the calling code forgot to dispose of you, you call Dispose in your finalizer.

Answered by Samuel

Solution #2

Others have already discussed the differences between Dispose and Finalize (by the way, the Finalize method is still referred to as a destructor in the language specification), so I’ll simply provide a few examples of where the Finalize method is useful.

Some types encapsulate disposable resources in such a way that they can be used and discarded in one action. The common usage is as follows: open, read or write, close (Dispose). It’s a great match for the utilizing construct.

Others are a little more challenging. For instance, WaitEventHandles are not utilized in this way because they are used to signal from one thread to another. The dilemma emerges, who should contact Dispose about these? As a precaution, these types have a Finalize method, which ensures that resources are disposed of when the instance is no longer referenced by the application.

Answered by Brian Rasmussen

Solution #3

When the trash collector reclaims an object, it calls the backstop method Finalize. Dispose is a “deterministic cleanup” mechanism that allows applications to release valuable native resources (window handles, database connections, and so on) when they are no longer needed, rather than holding them forever until the garbage collector (GC) gets around to them.

Dispose is always used by the user of an object. The GC is in charge of finalizing.

You implement Dispose as the implementer of a class if you have managed resources that need to be disposed away. If you have native resources, you must implement both Dispose and Finalize, which call the same function to release them. These idioms are usually combined using a private Dispose(bool disposing) function, where Dispose calls true and Finalize calls false. This method always frees native resources before checking the disposing parameter and disposing managed resources and calling GC if it is true. SuppressFinalize.

Answered by itowlson

Solution #4

When this item is no longer in use, the GC calls Finalize.

Dispose is a standard method that the class’s user can utilize to release any resources.

If the user forgets to call Dispose and the class has Finalize, the GC will ensure that it is called.

Answered by Bhushan Bhangale

Solution #5



Dispose/Finalized Pattern

Answered by GenZiy

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