CS202   3- ‹#›
Using Declarations
nA using declaration can bring any hidden public or protected base class member into the scope of the derived class.
nThese members act as overloaded members of the derived class.
nHowever, such members remain hidden in situations where the argument list is the same as the same named member in the derived class.
nIn the following example, the using declaration makes the function taking the double accessible to clients of the derived class. But, the function taking the int is still hidden in the derived class by declaring a derived class member function that has the same signature.