FtpWebResponse implements IDisposable, but it doesn't have a Dispose method. How is that possible?
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5 Answers
Its implemented in the base class WebResponse, see http://msdn.microsoft.com/en-us/library/system.net.webresponse_methods.aspx
3 Comments
MCS
I don't see any Dispose method there either.
blu
Scroll down to "Explicit Interface Implementations"
MCS
Oh, it is there, just further down the page under "Explicit Interface Implementations." Why is that? And why doesn't this method show up in IntelliSense when I have an instance of FtpWebResponse?
It does have the Dispose method through inheritance, but it is an explicit implementation. To call it, you would have to use
((IDisposable)myObject).Dispose();
Or, of course, just wrap it in a using block, as it does the explicit call for you.
3 Comments
Adam Houldsworth
+1 for mentioning its explicitly implemented. As others have said its on the base, but you'd still see it - you answered why you can't easily see it.
MCS
What's the reasoning behind using an explicit implementation?
Anthony Pegram
@MCS, that's a good question! Actually, it sounds like a good new question for stackoverflow of why some classes have explicit IDisposable implementations, as it sort of masks the fact that the object should be disposed for the average developer who is not consulting the documentation every time he/she uses a class.
When you implement an interface explicitly, you won't get the method in the listing. You will have to cast that object to implemented interface to get access to that method.
public class MyClass : IDisposable
{
void IDisposable.Dispose()
{
throw new NotImplementedException();
}
}
Reference : http://msdn.microsoft.com/en-us/library/ms173157.aspx
Comments
It's implemented in the base class WebResponse
void IDisposable.Dispose()
{
try
{
this.Close();
this.OnDispose();
}
catch
{
}
}
alt text http://img227.imageshack.us/img227/2428/redgatesnetreflector.png
Comments
It inherits from System.Net.WebResponse which implements these methods.
