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If I am using a ManagementObjectSearcher , I can easily wrap it in a using block: using (var searcher = new ManagementObjectSearcher(scope, query)) { // ... } It is also easy to dispose the collection returned from the searcher , due to the fact that foreach automatically calls dispose on the enumerator : using (var searcher = new ManagementObjectSearcher(scope, query)) { foreach(ManagementObject mo in searcher.Get()) { // ... } } But ManagementObject also implements IDisposable : using (var searcher = new ManagementObjectSearcher(scope, query)) { foreach(ManagementObject mo in searcher.Get()) { // ... mo.Dispose(); // ? } } Do I have to dispose each ManagementObject instance returned in this scenario? If I do, how do I make it exception safe? Is there a way I can still use Linq in this scenario (and still properly call Dispose )? Especially with constructions like searcher.Get().First() ? Edit : A few more related questions: Do I also have to call Dispose on the search result collection? How about the searcher? They both also implement their own IDisposable method, though it seems like the searcher only inherits the Dispose implementation from Component ; it doesn't add its own dispose behavior.

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