liskovElectronic.cs

    public class Car
    {
        public virtual void Drive()
        {
            Console.WriteLine("Car Drive");
        }

        public virtual void ShiftGear()
        {
            Console.WriteLine("shift gear");

        }
    }

    public class Toyota : Car
    {
        public override void Drive()
        {
            Console.WriteLine("Toyota Drive");
        }
        public override void ShiftGear()
        {
            Console.WriteLine("shift toyota gear");
        }

    }

    public class Audi : Car
    {
        public override void Drive()
        {
            Console.WriteLine("Toyota Drive");
        }

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

    }