（50分）求一个类要用到多态和重载！

请给出代码实例，体现一个类其中要用到多态和重载。 --------------------编程问答-------------------- 此示例定义了一个名为 Employee 的基类，和一个名为 SalesEmployee 的派生类。SalesEmployee 类包括一个额外的属性 salesbonus，并重写方法 CalculatePay 以便将该属性考虑在内。

using System;
class TestOverride
{
    public class Employee
    {
        public string name;

        // Basepay is defined as protected, so that it may be
        // accessed only by this class and derrived classes.
        protected decimal basepay;

        // Constructor to set the name and basepay values.
        public Employee(string name, decimal basepay)
        {
            this.name = name;
            this.basepay = basepay;
        }

        // Declared virtual so it can be overridden.
        public virtual decimal CalculatePay()
        {
            return basepay;
        }
    }

    // Derive a new class from Employee.
    public class SalesEmployee : Employee
    {
        // New field that will affect the base pay.
        private decimal salesbonus;

        // The constructor calls the base-class version, and
        // initializes the salesbonus field.
        public SalesEmployee(string name, decimal basepay,
                  decimal salesbonus) : base(name, basepay)
        {
            this.salesbonus = salesbonus;
        }

        // Override the CalculatePay method
        // to take bonus into account.
        public override decimal CalculatePay()
        {
            return basepay + salesbonus;
        }
    }

    static void Main()
    {
        // Create some new employees.
        SalesEmployee employee1 = new SalesEmployee("Alice",
                      1000, 500);
        Employee employee2 = new Employee("Bob", 1200);

        Console.WriteLine("Employee " + employee1.name +
                  " earned: " + employee1.CalculatePay());
        Console.WriteLine("Employee " + employee2.name +
                  " earned: " + employee2.CalculatePay());
    }
}
--------------------编程问答-------------------- 楼上正解 --------------------编程问答-------------------- 怎么都在用这个例子啊! --------------------编程问答-------------------- 教材嘛 --------------------编程问答-------------------- namespace ConsoleApplication1
{
    public class A
    {
        public virtual void Fun1(int i)
        {
            System.Console.WriteLine(i);
        }

    public void Fun2(A a)
        {
            a.Fun1(1);
            Fun1(5);
        }
    }

    public class B : A
    {
        public override void Fun1(int i)
        {
            base.Fun1(i + 1);
        }

        public static void Main()
        {
           A a = new A();
        A b = new B();

            a.Fun2(a);
            b.Fun2(b);
        }
    }
}

程序运行结果 --------------------编程问答-------------------- up

补充：.NET技术 ,  ASP.NET