CSharp/C#, EntityObject class

1. EDM: How to obtain the ObjectContext from an EntityObject

Hi,

Is there a way to find the ObjectContext to which an EntityObject is 
attached, from an EntityObject-derived reference alone?

Reason: so I don't need to pass the ObjectContext around- if I need the 
ObjectContext (eg. to delete an entity), I want to infer it from the 
EntityObject-derived Entity reference.

Thanks,
+Mark 

2. EntityObject Cancel Edit - ADO.Net

3. Class A contains class B, class B points to class A

Okay.

So I have a class A, which contains a vector of B.
Any B item is owned by a single, unique A. Indeed, when we create A, A
creates its B items.

B would like to know which A it is contained in, without having to be
perpetually told it by being passed A when B methods are called.
How can B store its A (or some handle to A) if A stores B?

Say that B has a pointer to its A.
However, if I create a copy of an A object and delete the original, all
the B->A pointers are invalidated. Doh!

Another solution would be to have a boost::shared_ptr to A in each B.
But that doesn't work, because when you construct an item of type A and
it wants to create the items of type B, A is a plain object and hasn't
been created using the smart_ptr 'new'.
[sorry to get slightly off-topic from vanilla C++ here]

Anybody have any suggestions?

Maybe someone can suggest an appropriate pattern or way to redesign?

Thanks

   Joseph

4. static classes, nested class, public class - CSharp/C#

5. Getting a reference to the base class of a base class from an inherited class

Is there any way to get a reference to the base class of a base class from
an inherited class? I need to call an overriden method.

Any help would be much appreciated.

6. Class B using Class C, and Class A using both B and C

7. Decralation of class inside other class and definition outside this class

We have here class of C++ language:
namespace Apt
{
      class Name1
           {
                public:
                   class Name2;
          };
}
I 'm give ebove  class Name2 so a declalation of class without  a definition
because to it do not shaded  class Name1.
Question:How have it define class Name2 outside of class Name1,and to have a
decralation od class Name2 inside a class Name1?
Thanks in Advance.

8. function defined with base class return derived class object when called with a derived class