using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var test1 = new Parent(1,2,"type1").Calculating();

        Console.WriteLine(test1);

        var test2 = new Sub1(1,2,"type2").Calculating();

        Console.WriteLine(test2);

    }

}

​

public class Parent

{

    public Parent(decimal data1, decimal data2, string inputype)

    {

        this.prop1 = data1;

        this.prop2 = data2;

    }

    public decimal prop1{get;set;}

    public decimal prop2{get;set;}

    public decimal prop3{get;set;}

    public virtual decimal Calculating()

    {

        return prop1+prop2;

    }

}

​

public class Sub1:Parent

{

    public Sub1 (decimal data1, decimal data2, string inputype): base(data1, data2,inputype)

    {

        this.prop1 = data1;

        this.prop2 = data2;

    }

    public override decimal Calculating()

    {

        var data = base.Calculating();

        return data*10;

    }

}

​