inheritance-prevention

I have a base class Foo that is concrete and contains 30 methods which are relevant to its subclasses. Now I've come across a situation that is specific only to the base class,and I want to create a method that cannot be inherited, is this possible? Class Foo { /* ... inheritable methods ... */ /* non-inheritable method */ public bool FooSpecificMethod() { return true; } } Class Bar : Foo { /* Bar specific methods */ } var bar = new Bar(); bar.FooSpecificMethod(); /* is there any way to get this to throw compiler error */ EDIT I'm not sure if I was clear originally. I do understand the

This question already has an answer here: C# - Can publicly inherited methods be hidden (e.g. made private to derived class) 10 answers The essence of the problem is, given a class hierarchy like this: class A { protected void MethodToExpose() {} protected void MethodToHide(object param) {} } class B : A { new private void MethodToHide(object param) {} protected void NewMethodInB() {} } class C : B { public void DoSomething() { base.MethodToHide("the parameter"); // This still calls A.MethodToHide() base.MethodToExpose(); // This calls A.MethodToExpose(), but that's ok base.NewMethodInB(); } }