using System;
public class Message{
  public int id {get;set;}
  //a lot of properties here
  public void print(){
  	Console.WriteLine("id is " + id );
 
  	//a lot of write lines here
  }
}
 
public class Comment : Message{
  public int parent_id {get;set;}
  //a lot of properties here
  public void print(){
  	//???
  }
}
public class Test
{
	public static void Main()
	{
		// your code goes here
		Message a = new Message();
		a.id = 10;
		a.print();
	}
}

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