C# 4.0 dynamic keyword

dynamic keyword is introduced in C# 4.0. It is used to declare variable and objects whose type will be determined at runtime. When the dynamic keyword is used in method overload concept. It can take any type of value as its parameter.
// C# 4.0 dynamic keyword - in Method Overloading

using System;
class dynamicDemo {
// Method takes dynamic type value as parameter
 public void display(dynamic a){
   Console.WriteLine("a's value = " + a);
    Console.WriteLine("a's Datatype = " + a.GetType());
  }

public void display(dynamic a, dynamic b) {
    Console.WriteLine("a's value = " + a);
    Console.WriteLine("a's Datatype = " +  a.GetType());
    Console.WriteLine("b's value = " + b);
    Console.WriteLine("b's Datatype = " +  b.GetType());
}

public void display(dynamic a, dynamic b, dynamic c){
  Console.WriteLine("a's value = " + a);
  Console.WriteLine("a's Datatype = " +
  a.GetType());
  Console.WriteLine("b's value = " + b);
  Console.WriteLine("b's Datatype = " + 
 b.GetType());
  Console.WriteLine("c's value = " + c);
  Console.WriteLine("c's Datatype = " +
  c.GetType());
}

static void Main(string[] args) {
    dynamic objD = new dynamicDemo();

      // passing String value as parameter
    Console.WriteLine("String Value Parameter");
      objD.display("Sanjay");

   Console.WriteLine("\n\nFloat Value Parameter");
      objD.display(456.45);

         // Two  value parameters
  Console.WriteLine("String Value Two Parameter");
      objD.display("Vijaya", "Lakshmi" );
  Console.WriteLine("\n\nInteger Value Two Parameter");
       objD.display(100, 300.45);


          //Three value parameters          	
        Console.WriteLine("\n\nThree Parameter Integer, String and Float");

        objD.display(204, "Kala" , 200.50);

        Console.WriteLine("\n\n Three parameters String, Integer and Float");
        objD.display("abc", 80, 23.89);
       Console.ReadKey();
    }
}