Employee

using System;

public class Employee
{
    public string Name { get; set; }
    public int EmployeeID { get; set; }
    public double Salary { get; set; }

    public virtual void CalculateSalary() {}

    public virtual void Display()
    {
        Console.WriteLine($"Name: {Name}");
        Console.WriteLine($"Employee ID: {EmployeeID}");
        Console.WriteLine($"Salary: {Salary}");
    }
}

public class FullTimeEmployee : Employee
{
    public double BasicSalary { get; set; }
    public int NumberOfDays { get; set; }
    public double HRA { get; set; }
    public double DA { get; set; }

    public override void CalculateSalary()
    {
        Salary = (BasicSalary * NumberOfDays) + HRA + DA;
    }
}

public class PartTimeEmployee : Employee
{
    public double DailyWages { get; set; }
    public int NumberOfDays { get; set; }

    public override void CalculateSalary()
    {
        Salary = DailyWages * NumberOfDays;
    }
}

class Program
{
    static void Main()
    {
        FullTimeEmployee fte = new FullTimeEmployee
        {
            Name = "John",
            EmployeeID = 10001,
            BasicSalary = 500,
            NumberOfDays = 20,
            HRA = 1500,
            DA = 900
        };
        fte.CalculateSalary();
        Console.WriteLine("Full Time Employee Details:");
        fte.Display();
        
        Console.WriteLine();

        PartTimeEmployee pte = new PartTimeEmployee
        {
            Name = "Jane",
            EmployeeID = 20002,
            DailyWages = 300,
            NumberOfDays = 15
        };
        pte.CalculateSalary();
        Console.WriteLine("Part Time Employee Details:");
        pte.Display();

        Console.ReadLine();
    }
}