(Hybrid Smart Client) RSS Media Player

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel; 
using System.Xml.Linq;
namespace RSSVideoPlayer.Model
{
 public class FeedItem : INotifyPropertyChanged 
    {
      
    private XElement _Feed; 
    private List<MediaItem> _MediaLinks; 
    private bool _selected; 
    
    public FeedItem(XElement element) 
    { 
        if (element == null) { 
            throw new NullReferenceException("New feed element is null"); 
        } 
        
        _Feed = element; 
        _MediaLinks = new List<MediaItem>(); 
        
        foreach (XElement m in element.Descendants()) 
        { 
            try { 
                if (m != null) { 
                    if (m.Name.LocalName == "content" | m.Name.LocalName == "enclosure") { 
                        MediaItem mediaitem = new MediaItem(m.Attribute("url").Value.ToString()); 
                        if (mediaitem.Filename.Substring(mediaitem.Filename.LastIndexOf(".")).ToLower() == ".wmv" || mediaitem.Filename.Substring(mediaitem.Filename.LastIndexOf(".")).ToLower() == ".mp4") { 
                            _MediaLinks.Add(mediaitem); 
                        }
                    }
                }
            }
            catch { throw new NullReferenceException("Error loading feed media"); } 
        }
        
    }
    
    public bool IsSelected { 
        get { return _selected; } 
        set { 
            if (_selected != value) { 
                _selected = value; 
                OnPropertyChanged("IsSelected"); 
                OnPropertyChanged("MediaItems"); 
            } 
        } 
    } 
    
    public List<MediaItem> MediaItems { 
        get { return _MediaLinks; } 
    } 
    
    public string Title { 
        get { 
            var t =  from e in _Feed.Descendants("title") select  e;
            if (t.Count() > 0) {
                return t.ElementAt<XElement>(0).Value.ToString();
            } 
            else { 
                return null; 
            } 
        } 
    } 
    
    public string Description { 
        get { 
               var t =  from e in _Feed.Descendants("title") select  e;
            if (t.Count() > 0) {
                return t.ElementAt<XElement>(0).Value.ToString();
            } 
            else { 
                return null; 
            } 
        } 
    } 
    
    public string Link { 
        get { 
                var t =  from e in _Feed.Descendants("title") select  e;
            if (t.Count() > 0) {
                return t.ElementAt<XElement>(0).Value.ToString();
            } 
            else { 
                return null; 
            } 
        } 
    }


    #region INotifyPropertyChanged Members
    private void OnPropertyChanged(string Propname)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(Propname));
    }
    public event PropertyChangedEventHandler PropertyChanged;

    #endregion
    }
}