How to enforce a method call (in the base class) when overriding method is invoked?

Question

I have this situation that when AbstractMethod method is invoked from ImplementClass I want to enforce that MustBeCalled m

Answer 1

How about

public abstract class AbstractClass
{
    public void AbstractMethod()
    {
        MustBeCalled();
        InternalAbstractMethod();
    }

    protected abstract void InternalAbstractMethod();

    public void MustBeCalled()
    {
        //this must be called when AbstractMethod is invoked
    }
}

public class ImplementClass : AbstractClass
{
    protected override void InternalAbstractMethod()
    {
        //when called, base.MustBeCalled() must be called.
        //how can i enforce this?
    }
}