Does the FtpWebResponse IDisposable close the response?

Question

I'm using the following code in my program, would I still need to call response.close()? Or does the FtpWebResponse IDisposable implementation close the response?

using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())
{

}

So basically, would I need to do this?

using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())
{
    response.close();
}

Ask yourself, is it going to cost me more if the close method will be called twice? — Izikon, Oct 24 '13 at 14:54
@Izikon Would it? As far as I know my whole application would crash if I did. Perhaps you could be a bit more specific instead of asking a question. — naed21, Oct 24 '13 at 14:58
This question is an interesting read: http://stackoverflow.com/questions/3119288/why-would-a-class-implement-idisposable-explicitly-instead-of-implicitly — Habib, Oct 24 '13 at 14:59

score 4 · Accepted Answer · answered Oct 24 '13 at 15:01

No you don't have to call Close, since Dispose already does that. FtpWebResponse is inherited from WebResponse and it has explicitly implemented Dispose, which internally call Close.

Code for WebResponse.cs from : http://www.dotnetframework.org/default.aspx/4@0/4@0/DEVDIV_TFS/Dev10/Releases/RTMRel/ndp/fx/src/Net/System/Net/WebResponse@cs/1305376/WebResponse@cs

 /// <internalonly>
        void IDisposable.Dispose() {
            try
            {
                Close();
                OnDispose();
            }
            catch { }
        }

Does the FtpWebResponse IDisposable close the response?

1 Answers1