Autogenerate Playlists for iTunes in Directory Order

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using iTunesLib;

namespace ItnuesPlayListManager
{
    public class FolderElement
    {
        /// <summary>
        /// Creates a new folder object with specifed itnues folder in specifed parent folder.
        /// </summary>
        /// <param name="parent">Parent folder which the folder need to be created.</param>
        /// <param name="itnuesfolder">Itnues folder object</param>
        public FolderElement(FolderElement parent,IITUserPlaylist itnuesfolder)
        {
            CreateNew(parent, itnuesfolder);
        }

        /// <summary>
        /// Creates a new folder object with specifed foldername in specifed parent folder.
        /// </summary>
        /// <param name="parent">Parent folder which the folder need to be created.</param>
        /// <param name="newfoldername">Name of new folder</param>
        public FolderElement(FolderElement parent,string newfoldername)
        {
            IITUserPlaylist itnuesFolderSource = (IITUserPlaylist)parent.ItnuesFolderSource.CreateFolder(newfoldername);
            CreateNew(parent, itnuesFolderSource);
        }

        private bool CreateNew(FolderElement parent,IITUserPlaylist itnuesfolder)
        {
            ItnuesFolderSource = itnuesfolder;
            this.Parent = parent;
            SubFolders = new SortedDictionary<string, FolderElement>();
            PlayLists = new SortedDictionary<string, PlayListElement>();
            return true;
        }
       
        /// <summary>
        /// Returns the parent of the current Itunes folder source.
        /// </summary>
        public FolderElement Parent
        {
            get;
            private set;
        }

        /// <summary>
        /// Gets Itnues backreference object
        /// </summary>
        public IITUserPlaylist ItnuesFolderSource
        {
            get;
            private set;
        }

        /// <summary>
        /// Gets a collection of subfolder in this folder
        /// </summary>
        public SortedDictionary<string, FolderElement> SubFolders
        {
            get;
            private set;
        }

        /// <summary>
        /// Gets a collection of playlists in this folder
        /// </summary>
        public SortedDictionary<string, PlayListElement> PlayLists
        {
            get;
            private set;
        }

        /// <summary>
        /// Moves a specific folder to another location.
        /// </summary>
        /// <param name="destination">destination folder to which the folder need to be moved.</param>
        /// <returns>Returns status</returns>
        public bool MoveFolder(FolderElement destination)
        {
            if(destination.SubFolders.ContainsKey(this.ItnuesFolderSource.Name))
                return false;
            Parent = destination;
            Parent.SubFolders.Remove(this.ItnuesFolderSource.Name);
            destination.SubFolders.Add(this.ItnuesFolderSource.Name, this);
            object val = destination.ItnuesFolderSource;
            this.ItnuesFolderSource.set_Parent(ref val);
            return true;
        }

        /// <summary>
        /// Deletes the specifed subfolder and its all subfolders and playlists in the current folder
        /// </summary>
        /// <param name="folder">folder object to delete</param>
        /// <returns>Returns status</returns>
        public bool DeleteSubFolder(FolderElement folder)
        {
            if (!this.SubFolders.ContainsKey(folder.ItnuesFolderSource.Name))
                return false;
            this.SubFolders.Remove(folder.ItnuesFolderSource.Name);
            folder.ItnuesFolderSource.Delete();
            return true;
        }
    }
}