C# - Can publicly inherited methods be hidden (e.g. made private to derived class)

Suppose I have BaseClass with public methods A and B, and I create DerivedClass through inheritance.

e.g.

public DerivedClass : BaseClass {}

Now I want to develop a method C in DerivedClass that uses A and B. Is there a way I can override methods A and B to be private in DerivedClass so that only method C is exposed to someone who wants to use my DerivedClass?