why is there no Dispose method on HttpWebResponse

问题

HttpWebReponse implements IDisposable interface, but why is there no Dispose method. It only contains Close method. Will be using pattern still available for this class?

回答1:

HttpWebResponse implements IDisposable interface explicitly. So you can call Dispose only when you cast HttpWebResponse to IDisposable. The Close method of HttpWebResponse calls Dispose internally.

HttpWebResponse response = // assigned from somewhere
IDisposable disposableResponse = response as IDisposable;

disposableResponse.Dispose();

Since HttpWebResponse implements IDisposable you can use it with an using-statement.

HttpWebResponse response = // assigned from somewhere

using(response) {
  // do your work;
}

来源：https://stackoverflow.com/questions/8063504/why-is-there-no-dispose-method-on-httpwebresponse