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In ASP.NET if items are left in the session state that Implement IDisposable but are never specifically removed and disposed by the application when the session expires will Dispose be called on the objects that any code in Dipose() will execute?
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You can call the IDisposable. Dispose() method from the finally block of a try/finally statement. By using the finally block, you can clean up any resources that are allocated in a try block, and you can run code even if an exception occurs in the try block.
in a class, you should implement IDisposable and overwrite the Dispose method to allow you to control when the memory is freed. If not, this responsibility is left to the garbage collector to free the memory when the object containing the unmanaged resources is finalized.
Typically, types that use unmanaged resources implement the IDisposable or IAsyncDisposable interface to allow the unmanaged resources to be reclaimed. When you finish using an object that implements IDisposable, you call the object's Dispose or DisposeAsync implementation to explicitly perform cleanup.
The dispose pattern is used for objects that implement the IDisposable interface, and is common when interacting with file and pipe handles, registry handles, wait handles, or pointers to blocks of unmanaged memory. This is because the garbage collector is unable to reclaim unmanaged objects.
I'd disagree with Sean's answer; firstly, finalizers should not be routinely added to classes, even if they are IDisposable - finalizers should only really be used in classes that represent unmanaged resources. Conversely, a class with a finalizer often is also IDisposable.
Re the question: is Dispose() called - no, it isn't. The object will be garbage collected at some point in the future (indeterminate), but that is about it. A finalizer wouldn't add much here, as any encapsulated objects will also already be eligible for collection (assuming that they aren't referenced elsewhere).
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