Which of the following is correct about the C#.NET snippet given below?

 namespace FresherGateConsoleApplication
 {   
    class Baseclass  
    {       
        public void fun()    
        {              
            Console.WriteLine("Hi" + " ");    
        }     
        public void fun(int i)   
        {             
           Console.Write("Hello" + " ");    
        }   
    }    
    class Derived: Baseclass   
    {     
       public void fun()    
       {          
          Console.Write("Bye" + " ");     
          }      
      }    
      class MyProgram     
      {

           static void Main(string[ ] args)   
           {       
                 Derived d;    
                 d = new Derived();   
                 d.fun();    
                 d.fun(77);  
           }    
       } 
    }