My Composite in C #

Mycomposite
Using System;
Using System.Collections;

----------------------------------Class fileelement
Abstract class Cfileelement
{
Fields
protected string name;

Public cfileelement (string name)
{
This.name=name;
}

public abstract void Add (Cfileelement e);
public abstract void Remove (Cfileelement e);
public abstract void Display ();
};

Class CFile
Class Cfile:cfileelement
{
Public CFile (string name): base (name) {}

public override void Add (Cfileelement e)
{
Console.WriteLine ("Can ' t add any files under a file!");
}
public override void Remove (Cfileelement e)
{
Console.WriteLine ("Can ' t remove any sub files!");
}
public override void Display ()
{
Console.WriteLine (this.name);
}
};

Class Cfolder
Class Cfolder:cfileelement
{
Private ArrayList Children =new ArrayList ();

Public Cfolder (string name): base (name) {}

public override void Add (Cfileelement e)
{
Children. ADD (e);
}
public override void Remove (Cfileelement e)
{
Children. Remove (e);
}
public override void Display ()
{
Console.WriteLine (this.name);
foreach (Cfileelement e in children)
{
E.display ();
}
}

};
----------------------------------Class Element

TestApp
Class TESTAPP
{
public static void Main (string[] args)
{
Cfolder root = new Cfolder ("z:/");
Cfolder afolder=new cfolder ("games/");

Afolder. ADD (New CFile ("Cstrike.exe"));
Root. ADD (Afolder);

Root. Display ();
while (true);
}
};