Does "using" statement always dispose the object?

Question

Does the using statement always dispose the object, even if there is a return or an exception is thrown inside it? I.E.:

using (var myClassInstance = new MyClass()) {     // ...     return; } 

or

using (var myClassInstance = new MyClass()) {     // ...     throw new UnexplainedAndAnnoyingException(); } 

Answer 1

Yes, that's the whole point. It compiles down to:

SomeDisposableType obj = new SomeDisposableType(); try {     // use obj } finally {     if (obj != null)          ((IDisposable)obj).Dispose(); } 

Be careful about your terminology here; the object itself is not deallocated. The Dispose() method is called and, typically, unmanaged resources are released.