From base class in C#, get derived type?

Question

Let's say we've got these two classes:

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

How can I find out from within the constructor of Base that Derived is the invoker? This is what I came up with:

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

Is there another way that doesn't require passing typeof(Derived), for example, some way of using reflection from within Base's constructor?

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 { } } 

This program outputs the following:

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() would give you what you're looking for.