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A .Net assembly uses a manifest to specify the contents of the assembly, be they code and/or resources. They also do not require registering with the Windows machine. A COM object publishes its contents via classid's or progid's to the Windows Registry. COM objects use Reference Counting to manage their memory, and will deterministically clean their memory resources when the reference count reaches zero. .Net assemblies are garbage collected, and their memory reclamation is non-deterministic (meaning, don't make any assumptions on when resources will be cleaned up.) COM objects can have different threading models. .Net objects can only have "Single Threaded Apartment" threading model (I think... you might want to look that up before you use it on your homework assignment).

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Q: What is difference in assembly in net and com object?
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