Hi all,

I would like to ask you a question regarding inheritence in C#.

I have a class which inherits from COM object, but then I want to pass
this class to the function expecting interface which COM object is
inherited from, I can't do it.

See sample:

C++ ATL project with COM interface A and COM object AInst
interface A
{
// some methods
}

class AInst : public A
{
// some methods
}

In C# I would like to do:
class AInstCSharp : public AInst
{
}

class B
{
  public static void Do( A a )
  {
      //do something
  }
}

Now somewhere in C# code:
AInstCSharp a = new AInstCSharp();

//next line will not compile due to an error CS1502
B.Do( a );

It seems that original interface A can't be used and also in object
browser I can't see that class AInstCSharp is inherited from A.
Do you have any idea how I can use it?

Fox