Make class B visible only to class A inheritors

[Giulio Petrucci]

Hi there,

I have two classes A and B in the same assembly. Every instance of the A
class holds a reference to a B instance. I need to make B visible
outside the assembly scope only to A inheritors. Is it possible?
Thanks in advance!

Ciao,
Giulio - Italy

--
OnAir:

http://www.giuliopetrucci.it

http://www.fujikomonamour.com

[Marc Gravell]

Re: Make class B visible only to class A inheritors

You can make B a protected nested class of A:

public class A
{
B b = new B();
protected B BInstance {get {return b;}}
protected class B
{
}
}

Now any subclass of A knows about the nested B class, and can get the
correct instance via the protected BInstance property. Obviously
change the names ;-p

Marc

[=?UTF-8?B?R8O2cmFuIEFuZGVyc3Nvbg==?=]

Re: Make class B visible only to class A inheritors

Giulio Petrucci wrote:

Hi there,
>
I have two classes A and B in the same assembly. Every instance of the A
class holds a reference to a B instance. I need to make B visible
outside the assembly scope only to A inheritors. Is it possible?
Thanks in advance!
>
Ciao,
Giulio - Italy
>

You can put the class B inside the class A and make it internal. I think
that would accomplish exactly what you ask for.

If you make it protected, it will be visible only to the A class and
classes that inherit A, even within the assembly.

--
Göran Andersson
_____

http://www.guffa.com

[Marc Gravell]

Re: Make class B visible only to class A inheritors

Re-reading the OP, I think we're both half-right, Göran; on this
occasion I suspect "protected internal" is the right level ;-p

public class A {
B b = new B();
protected internal B BInstance {get {return b;}}
protected internal class B { }
}

Now type A.B and the property A.BInstance are avaible to all
subclasses of A, and all code in the same assembly as A.

Marc