Larry Smith wrote:
> I just read a blurb in MSDN under the C++ "ref" keyword which states that:
>
> "Under the CLR object model, only public single inheritance is supported".
>
> Does this mean that no .NET class can ever support multiple inheritance.

> This is true of course since these languages only support single (class)
> inheritance. However, it should be true for all .NET classes based on the
> first quote above. My issue is therefore this. I want to retrieve the base
> class of an arbitrary class in an arbitrary code file by invoking
> "CodeClass2.Bases.Item(1)". This works in my testing but will it always work
> for all languages in theory, assuming the class I'm targetting is always a
> .NET class of course. Thanks in advance.

>> I just read a blurb in MSDN under the C++ "ref" keyword which states
>> that:
>>
>> "Under the CLR object model, only public single inheritance is
>> supported".
>>
>> Does this mean that no .NET class can ever support multiple inheritance.
>
> I belive so.
>
>> This is true of course since these languages only support single (class)
>> inheritance. However, it should be true for all .NET classes based on the
>> first quote above. My issue is therefore this. I want to retrieve the
>> base class of an arbitrary class in an arbitrary code file by invoking
>> "CodeClass2.Bases.Item(1)". This works in my testing but will it always
>> work for all languages in theory, assuming the class I'm targetting is
>> always a .NET class of course. Thanks in advance.
>
> If is is arbitrary code, then I belive that you should be using
> Type BaseType.

> The Visual Studio Extensibility model also supports non-CLR languages
> (native C++ for example), so it has support for multiple inheritance.
>
> The .NET types do not support multiple inheritance as you've already found
> out. I've read a couple of rumors that multiple inheritance will probably
> find its way back into the CLR in a future version...

> I just read a blurb in MSDN under the C++ "ref" keyword which states that:
>
> "Under the CLR object model, only public single inheritance is supported".
>
> Does this mean that no .NET class can ever support multiple inheritance. In
> C++ for instance I noticed that the compiler flags an error if you use the
> "ref" keyword on a class with multiple base classes. This supports the above
> quote. However, under the "CodeClass2.Bases" property (part the VS
> extensibility model), it states that:
>
> "Bases are super types of CodeElements. For Visual Basic and Visual C#
> there is always only one element in the collection except when the code type
> is a CodeInterface".
>
> This is true of course since these languages only support single (class)
> inheritance. However, it should be true for all .NET classes based on the
> first quote above. My issue is therefore this. I want to retrieve the base
> class of an arbitrary class in an arbitrary code file by invoking
> "CodeClass2.Bases.Item(1)". This works in my testing but will it always work
> for all languages in theory, assuming the class I'm targetting is always a
> .NET class of course. Thanks in advance.

"Larry Smith" <no_spam@_nospam.com> wrote in message
news:eZO4O8axHHA.1208@TK2MSFTNGP05.phx.gbl...

> Thanks for the clarification (appreciated). As for the rumour, I'm not
> sure how they'll tackle that given that there already seem to be some
> built-in assumptions based on single-inheritance. They could change this
> of course but it might cause a lot of problems. Anyway, thanks again.