System.Net.HttpListener only explicitly implements IDisposable

Why does HttpListener explicitly implement IDisposable. This means you have to cast to IDisposable before calling d开发者_如何学Pythonispose and in my opinion makes the fact you have to call dispose less obvious.

1. You don't need an explicit cast if you use a using block. (This is the preferred idiom, where possible, for dealing with IDisposable objects.)

   using (HttpListener hl = /* ... */)
   {
       // ...
   }
   

2. It has a Close method which is pretty-much an alias for Dispose. (Not my favourite pattern, but the framework designers seem to like it!)

   HttpListener hl = /* ... */
   try
   {
       // ...
   }
   finally
   {
       hl.Close();
   }