How to implement compo patt in the code below..!

interface IDirectory
{
    public void Copy();
    public void Move(IDirectory Directory);
    public void Delete();
}

class Directory :IDirectory
{
   public List<IDirectory> list = new List<IDirectory>();

   public void Delete(IDirectory Dir)
   {
       foreach (IDirectory item in list)
       {
           item.Delete();
       }
   }

   public void Add(IDirectory Dir)
   {
       list.Add(Dir);
   }

   public void Remove(IDirectory Dir)
   {
       list.Remove(Dir);
   }
}

class File : IDirectory
{
    public void Copy()
    {
            // File copy code
    }
    public void Move(IDirectory Directory)
    {
        // File move code
    }
    public void Delete()
    {
        // File delete code
    }
}