How to store and call generic?

Question

C++ / C#

Inherited the generic type from the base type.
There is a collection of basic type.
I add generic there everything is OK.
But how now to get them and call the unique method?
That is unpacking to generic type turns out.

Answer 1

Well, as trellis pointed out in the comments, without the code, it's really about nothing, but it seems to me that you are using generic classes incorrectly, since such a problem arises. All public methods should, in theory, be in an abstract form in the base class, and the generic should contain a type-specific implementation. This is in the general case.