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    <p>You don't mention what the scope of the variable containing the ComFacade instance is. If the variable is static then this would be the behavior I would expect.</p> <p>I would suggest you understand the ASP.NET page lifecyle and the implications of that with variables of different scopes. Unless the COM reference is supposed to be a singleton then you will need to create a new instance each time the page loads and dispose of it as appropriate (probably when the page is rendered).</p> <p><b>Update (based on comment)</b></p> <p><em>Note</em>: This answer applies to any object in .NET that you try to keep around longer that a single page request. Eventually all objects are disposed / garbage collected.</p> <p>You mention that the object is created when the user logs in and disposed when they log off. The only way you could do this is to cache the object in something static to keep reference to it. Keep in mind that every time the user does something in their browser a request goes from the browser back to IIS/ASP.NET for processing and invokes a page life-cycle (over-simplification, but good enough). Each time the user does this the page may be handled by a different thread in the App Pool each time. If more than one user is interacting with the site then over a period of time the same thread may (and most likely will) get used by more than one user. In short this is why with ASP.NET/IIS you must be extremely cautious with using singletons / static members.</p> <p>On a side note, my question would be why do you need a reference to the COM object for more than a single page request?</p>
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    1. USKen Henderson
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    1. COThe ComFacade instance is not static, it is created when the user signson and the same instance is used for the user for all his operations with the com until the user signsoff, then the ComFacade instence is disposed. In this case i think the com should also be disposed when the user signsoff but this does not happen.
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    2. CO@Arvind unless the object is static, it won't persist between requests, meaning that it has to be reinstantiated on every page load. Also, it is the responsibility of the process that uses the object to call .Dispose() - it doesn't happen automatically.
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    3. CO@Ken & David Thank you for the explanation, the com object we use creates message queues for each client and this is used to interact with host services since all the operations in the application use this the object is kept alive until signoff. The Comfacade is initialized in a object which is kept in session, when the user signsoff or the browser is closed I dispose the com object and then the ComFacade and the object is removed from the session and the session is cleared and abandoned to try fully dispose the com object. This anyway did not work.
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