再次调用另一个类的抽象继承方法

HelperClass .

例如:我有两个抽象派生类。我创建 ClassA 然后 电话 TakeAction 采取行动 助手类 class the method 解决问题`。

我的问题是:我怎样才能再次呼叫a A类 助手类 ? 因为SolveProblem有一些逻辑,它将决定是否返回。

class Program {
    static void Main(string[] args) {
        var classA = new ClassA();
        classA.StartOperation();
    }
}

public abstract class ClassAbstract {
    public abstract void StartOperation();

    public void TakeAction() {
        var helper = new HelperClass();
        helper.SolveProblem(DayOfWeek.Sunday);
    }

    public abstract void WeekDayOperation();
    public abstract void WeekEndOperation();
}

public class ClassA : ClassAbstract {
    public override void StartOperation() {
        TakeAction();
    }

    public override void WeekDayOperation() {
    }

    public override void WeekEndOperation() {
        throw new NotImplementedException();
    }
}

public class ClassB : ClassAbstract {
    public override void StartOperation() {
        TakeAction();
    }

    public override void WeekDayOperation() {
    }

    public override void WeekEndOperation() {
        throw new NotImplementedException();
    }
}

public class HelperClass {
        public void SolveProblem(DayOfWeek day) {
        //Problem solved. I need to call "CallThisMethod" who called this helper class
        //How to I Call
        switch(day) {
            case DayOfWeek.Sunday:
            case DayOfWeek.Saturday:
                ClassA.WeekEndOperation();
                break;
            case DayOfWeek.Friday:
                FridayOperations();
                break;
            default:
                ClassA.WeekDayOperation();
                break;
        }
    }

    public void FridayOperations() {

    }
}