Do you use databinding?

>Using C#.Net, we have problems managing the system resources and worst, it causes memory leak that hangs the system. It seems that .Net don't clear resources used when closing forms but only during closing the entire application. We are using ComponentOne as our data layer component and whenever a form is instantiated and afterwards closed, the resources used were not cleared. Is this a .NET specific problem or just a third party (ComponentOne) problem?
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>TIA