Class Vehicles Learn programming C#

using System;
namespace Vehicles
{
    class Car : Vehicle
    {

    }
}

using System;
namespace Vehicles
{
    class ExcursionVan : Van
    {
    }
}

using System;
namespace Vehicles
{
    class Minivan : Van
    {
        protected bool cargo_Net;
        protected bool dual_Sliding_Doors;

        public Minivan()
        {
        }
        public Minivan(bool cargo_Net, bool dual_Sliding_Doors)
        {
            this.cargo_Net = cargo_Net;
            this.dual_Sliding_Doors = dual_Sliding_Doors;
        }

        public void SetCargoNet(bool cargo_Net)
        {
            this.cargo_Net = cargo_Net;
        }
        public void SetDualSlidingDoors(bool dual_Sliding_Doors)
        {
            this.dual_Sliding_Doors = dual_Sliding_Doors;
        }

        public bool HasCargoNet()
        {
            return cargo_Net;
        }
        public bool HasDualSlidingDoors()
        {
            return dual_Sliding_Doors;
        }
    }
}

using System;
namespace Vehicles
{
    class Sportscar : Car
    {

    }
}

using System;
namespace Vehicles
{
    class TestVehicles
    {
        static void Main()
        {
            Car myCar = new Car();
            myCar.Drive();

            Sportscar mySportsCar = new Sportscar();
            mySportsCar.Drive();

            Van myVan = new Van();
            myVan.Drive();

            Minivan myMiniVan = new Minivan();
            myMiniVan.Drive();

            ExcursionVan myExcursionVan = new ExcursionVan();
            myExcursionVan.Drive();
        }
    }
}

using System;
namespace Vehicles
{
    class Van : Vehicle
    {

    }
}

using System;
namespace Vehicles
{
    class Vehicle
    {
        protected string make;
        protected string model;
        protected string year;

        public Vehicle()
        {
        }
        public Vehicle(string make, string model, string year)
        {
            this.make = make;
            this.model = model;
            this.year = year;
        }

        public string Make
        {
            set { make = value; }
            get { return make; }
        }
        public string Model
        {
            set { model = value; }
            get { return model; }
        }
        public string Year
        {
            set { year = value; }
            get { return year; }
        }

        public void Accelerate()
        {
        }
        public void Decelerate()
        {
        }
        public void Drive()
        {
        }
        public void Start()
        {
        }
        public void Stop()
        {
        }
    }
}