using System;
using System.Collections.Generic;

namespace ConsoleApplication1
{
     class Program
     {
          static void Main(string[] args)
          {
               dynamic myValue;

               // myValue -This is int
               myValue = 3;

               // myValue -This is string
               myValue = "Hello";

               // myValue -This is List
               myValue = new List<double>();
          }
     }
}

using System;

namespace ConsoleApplication1
{
     class Program
     {
          static void Main(string[] args)
          {
               dynamic myValue = "Hello";

               myValue.book1 = 7; // property book1 we have declared nowhere
               // there is no error on compilation (dynamic the object is ignored by the compiler for errors)
               // RUNTIME ERROR (there is no such property)
          }
     }
}

using System;
using System.Collections.Generic;

namespace ConsoleApplication1
{
     class Program
     {
          static void ShowValue(dynamic value)
          {
               Console.WriteLine(value);
          }

          static void Main(string[] args)
          {
               ShowValue(3);

               ShowValue("Hello");

               ShowValue(new List<double>());
          }
     }
}