C#

MyClass.SomeMethod(new AudiA8(), new ZXR());

... given

class AudiA8 : Car {
 ...
}
 
class ZXR : Moto {
 ...
}

myClass<car, mot>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TestGeneric
{
    class Program
    {
        static void Main(string[] args)
        {
            //Input are string they comes from excel! I can customize the string but is a string
            string myCar = "carA";
            string myMoto = "motoB";

            //here the problem:

            // i SHOULD INIZIALIZE mPricer using string "carA" and "carB". 
            // I need to obtain an istance of mPricer<carA,motoB>  starting from strings

            mPricer< (car) Activator.CreateInstance(myCar), (moto) Activator.CreateInstance(myMoto)> Pr = new  mPricer< (car) Activator.CreateInstance(myCar), (moto) Activator.CreateInstance(myMoto)>();
           
        }
    }

    //dummy class for example.. It is only example to show it must have two generics
    public class mPricer<T, G> 
        where T:car, new()
        where G : moto, new()
    {
        double total;
        public mPricer()
        {
            T c = new T();
            G m = new G();
            total = c.GetPrice() + m.GetCost();        
        }

        public void ShowTotal() 
        {
            Console.WriteLine(total);
        }
    }

    public abstract class car { abstract public double GetPrice();}
    public class carA : car { public override double GetPrice() { return 11; } }
    public class carB : car { public override double GetPrice() { return 12; } }

    public abstract class moto { abstract public double GetCost(); }
    public class motoA : moto { public override double GetCost() { return 7; } }
    public class motoB : moto { public override double GetCost() { return 6; } }


}

// I need to obtain an istance of mPricer<carA,motoB> starting from strings

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace TestGeneric
{
    class Program
    {
        static void Main(string[] args)
        {            
            string myCar = "carA";
            string myMoto = "motoB";
 
            mPricer Pr = new  mPricer(myCar,myMoto);
           
        }
    }
 
    public class mPricer 
    {
        double total;
        public mPricer(string carId, string motoId)
        {
            Car c = (car) Activator.CreateInstance(myCar);
            Moto m = (moto) Activator.CreateInstance(myMoto);
            total = c.GetPrice() + m.GetCost();        
        }
 
        public void ShowTotal() 
        {
            Console.WriteLine(total);
        }
    }
 
    public abstract class car { abstract public double GetPrice();}
    public class carA : car { public override double GetPrice() { return 11; } }
    public class carB : car { public override double GetPrice() { return 12; } }
 
    public abstract class moto { abstract public double GetCost(); }
    public class motoA : moto { public override double GetCost() { return 7; } }
    public class motoB : moto { public override double GetCost() { return 6; } }
 

}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace TestGeneric
{
    class Program
    {
        static void Main(string[] args)
        {            
            string myCar = "carA";
            string myMoto = "motoB";

            Car c = (car) Activator.CreateInstance(myCar);
            Moto m = (moto) Activator.CreateInstance(myMoto);
 
            mPricer Pr = new  mPricer(c,m);
           
        }
    }
 
    public class mPricer 
    {
        double total;
        public mPricer(Car c, Moto m)
        {
            total = c.GetPrice() + m.GetCost();        
        }
 
        public void ShowTotal() 
        {
            Console.WriteLine(total);
        }
    }
 
    public abstract class car { abstract public double GetPrice();}
    public class carA : car { public override double GetPrice() { return 11; } }
    public class carB : car { public override double GetPrice() { return 12; } }
 
    public abstract class moto { abstract public double GetCost(); }
    public class motoA : moto { public override double GetCost() { return 7; } }
    public class motoB : moto { public override double GetCost() { return 6; } }
 
 
}

public class mPricer<T, G> 

Type carType = Type.GetType("MyNamespace.Cars.Car");
Car car = (Car)Activator.CreateInstance(carType);

backup database Invoice_Master to disk="C:\MyPath\BackupName.bak"