using System;

​

​

public class Program

{

    public static void Main()

    {

            //Exercise 1 :  

            EmployeeTax emptax = new EmployeeTax {Id=1,Name="Emp1",Gender="M",DOB=Convert.ToDateTime("01-JAN-1990"),Salary=100000};

            Console.WriteLine("Calculated Tax:" + emptax.CalculateTax());

    }

}

    public class EmployeeTax : TaxCalculation

    { 

      public int Id {get;set;}

      public string Name {get;set;}

      public string Gender{get;set;}

      public DateTime  DOB {get;set;}

      public double Salary {get; set;}

​

      public override double CalculateTax()

      {

          var date = DateTime.Now.AddYears(-40);

          if (!String.IsNullOrEmpty(Gender) && DOB != null)

          {

              if (Gender == "M" && DOB.Date <= date)

              {

                  return (Salary * 4) / 100;

              }

              else

              {

                  return (Salary * 6)/100;

              }

          }

          else

          {

              return 0;

          }

      }  

    }

​

    public class TaxCalculation

    {

        public virtual double CalculateTax()

        {

            return 0;

        } 

    }

​

​