为什么Stream类要实现IDisposable？

Question

Why does the Stream class implement IDisposable? I think the Stream class itself doesn't have any unmanaged resources. Certainly, some of the subclasses have unmanaged resources (eg FileStream), but not all of subclasses have unmanaged resources (eg MemoryStream).

If the answer to the above question is "because the subclasses of the Stream class may have unmanaged resources", then why doesn't the Object class implement IDisposable?

Answer 1

No one said the resources had to be unmanaged. It has resources that need to be cleaned up. You can accomplish the same thing with Close() , but the idea is that you can use it with a using statement, and then the resources will be guaranteed to be cleaned up, even in the case of an exception.

using (var s = new System.IO.MemoryStream())
{
    //do something.
}