Question about interfaces

[Geoff Pennington]

Is there an easy way to find out what classes implement a given interface?
For example, it might be useful to know what classes implement ICollectible.

Much obliged,
Geoff.

[Imran Koradia]

If TypeOf myCollection Is ICollectible Then
' myCollection implements ICollectible
End If

If GetType(ICollectible).IsAssignableFrom(myCollectio n.GetType) Then
'again, myCollection implements ICollectible
End If

In C#, I believe you can use the typeof keyword to get the type of an
object.

Also, You can use the Type.GetInterfaces method to get a collection of type
objects for all the interfaces implemented by an object. You can also use
the Type.GetInterface method to get an interface by name.

hope that helps..
Imran.
"Geoff Pennington" <Ge*******@verizon.netNoSpam> wrote in message
news:ev**************@TK2MSFTNGP14.phx.gbl...

Is there an easy way to find out what classes implement a given interface?
For example, it might be useful to know what classes implement ICollectible.
Much obliged,
Geoff.

[Jon Skeet [C# MVP]]

Geoff Pennington <Ge*******@verizon.netNoSpam> wrote:

Is there an easy way to find out what classes implement a given interface?
For example, it might be useful to know what classes implement ICollectible.

Again, MSDN is your friend. Go to the overview page for the interface,
and it lists the classes which implement it directly.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Geoff Pennington]

If I understand correctly, you are answering the opposite question from the
one I asked. Your reply seems to address the question "What interfaces does
this class implement?", but what I want to know is "What classes implement
this interface?".

Sometimes, when choosing a class for a specific purpose, I want to be sure I
have considered all the options.

Geoff.

"Imran Koradia" <no****@microsoft.com> wrote in message
news:ek**************@TK2MSFTNGP10.phx.gbl...

If TypeOf myCollection Is ICollectible Then
' myCollection implements ICollectible
End If

If GetType(ICollectible).IsAssignableFrom(myCollectio n.GetType) Then
'again, myCollection implements ICollectible
End If

In C#, I believe you can use the typeof keyword to get the type of an
object.

Also, You can use the Type.GetInterfaces method to get a collection of type objects for all the interfaces implemented by an object. You can also use
the Type.GetInterface method to get an interface by name.

hope that helps..
Imran.
"Geoff Pennington" <Ge*******@verizon.netNoSpam> wrote in message
news:ev**************@TK2MSFTNGP14.phx.gbl...

Is there an easy way to find out what classes implement a given interface? For example, it might be useful to know what classes implement

ICollectible.

Much obliged,
Geoff.

[Geoff Pennington]

OK, good. Thanks.

"Jon Skeet [C# MVP]" <sk***@pobox.com> wrote in message
news:MP************************@msnews.microsoft.c om...

Geoff Pennington <Ge*******@verizon.netNoSpam> wrote:

Is there an easy way to find out what classes implement a given interface? For example, it might be useful to know what classes implement

ICollectible.
Again, MSDN is your friend. Go to the overview page for the interface,
and it lists the classes which implement it directly.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Imran Koradia]

"Geoff Pennington" <Ge*******@verizon.netNoSpam> wrote in message
news:e6**************@TK2MSFTNGP09.phx.gbl...

If I understand correctly, you are answering the opposite question from the one I asked. Your reply seems to address the question "What interfaces does this class implement?", but what I want to know is "What classes implement
this interface?".

My apologies. I misread your question. However, there's no way through code
to figure out what classes implement a given interface. If you are talking
about classes and interfaces in the .NET class library, you can look up the
MSDN documentation for the given interface - it'll have a list of classes
that directly implement the interface.

hope that helps..
Imran.