Which is better, and when: using statement or calling Dispose() on an IDisposable in C#?

Question

Suppose I have the following:

using(var ctx = DataContextFactory.Create(0))
{ ... Some code ... }

Why not just do the following and lose a

Answer 1

The only place you don't want to use a using block is where the disposable object is scoped outside of the function. In this case, your class should implement IDisposable and dispose of the object in its Dispose().