從C＃中的基類，得到派生類型？

Question

假設我們有這兩個類：

public class Derived : Base
{
    public Derived(string s)
        : base(s)
    { }
}

public class Base
{
    protected Base(string s)
    {

    }
}

如何從Base的構造函數中找出Derived是調用者？ 這就是我想出的：

public class Derived : Base
{
    public Derived(string s)
        : base(typeof(Derived), s)
    { }
}

public class Base
{
    protected Base(Type type, string s)
    {

    }
}

是否有另一種方法不需要傳遞typeof(Derived) ，例如，在Base的構造函數中使用反射的某種方式？

Answer 1

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Base b = new Base();
            Derived1 d1 = new Derived1();
            Derived2 d2 = new Derived2();
            Base d3 = new Derived1();
            Base d4 = new Derived2();
            Console.ReadKey(true);
        }
    }

    class Base
    {
        public Base()
        {
            Console.WriteLine("Base Constructor. Calling type: {0}", this.GetType().Name);
        }
    }

    class Derived1 : Base { }
    class Derived2 : Base { }
}

該程序輸出以下內容：

Base Constructor: Calling type: Base
Base Constructor: Calling type: Derived1
Base Constructor: Calling type: Derived2
Base Constructor: Calling type: Derived1
Base Constructor: Calling type: Derived2

Answer 2

GetType()會給你你想要的東西。