How to call a field of child class in the method of parent class in C#

I want to print the salary of invoked (any of them) child class in the inherited method of Detail(). this cannot be done in this scenario. How would I get the salary with all other details of an employee.

Here is the code

using System;

class Employee
{
    public int ID;
    public string Name;
    public string Gender;
    public string City;

    public void Detail()
    {
        Console.WriteLine("Name: {0} \nGender: {1} \nCity: {2} \nID: {3}", Name, Gender, City, ID); //I want to get Yearly or Hourly Salary with these all
    }
}

class PermanatEmp : Employee
{
    public float YearlySalary;

}

class TempEmp : Employee
{
    public float HourlySalary;
}



class Class4
{
    static void Main()
    {
        PermanatEmp pe = new PermanatEmp();
        pe.ID = 101;
        pe.Name = "XYZ";
        pe.Gender = "Male";
        pe.City = "London";
        pe.YearlySalary = 20000;
        pe.Detail(); // how to get Salary with these all 


    }

}