Removing First Item from listbox while binding to listbox - windows-phone-8

Question

I have parsed the feed http://www.toucheradio.com/toneradio/android/toriLite/AndroidRSS.xml
And all items from rss feed displayed in listbox.Now I dont want to get first item I have to omit it.How Can I do it.
MainPage.xaml.cs:
namespace tori
{
public partial class MainPage : PhoneApplicationPage
{
// Constructor
public MainPage()
{
InitializeComponent();
// is there network connection available
if (!System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable())
{
MessageBox.Show("No network connection available!");
return;
}
// start loading XML-data
WebClient downloader = new WebClient();
Uri uri = new Uri(" http://www.toucheradio.com/toneradio/android/toriLite/AndroidRSS.xml", UriKind.Absolute);
downloader.DownloadStringCompleted += new DownloadStringCompletedEventHandler(ChannelDownloaded);
downloader.DownloadStringAsync(uri);
}
void ChannelDownloaded(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Result == null || e.Error != null)
{
MessageBox.Show("There was an error downloading the XML-file!");
}
else
{
// Deserialize if download succeeds
XDocument document = XDocument.Parse(e.Result);
var queue = from item in document.Descendants("item")
select new Item
{
title = item.Element("title").Value
,
link = item.Element("link").Value
,
ThumbnailUrl = item.Element(item.GetNamespaceOfPrefix("media") + "thumbnail").Attribute("url").Value
,
};
itemsList.ItemsSource = queue;
}
}
public class Item
{
public string title { get; set; }
public string ThumbnailUrl { get; set; }
public string link { get; set; }
}
If I write queue.RemoveAt(0);
i was getting error at RemoveAt.
Can anybody please tell me how can I do that.
Many Thanks in advance.

Answer 1

You can easily do this using LINQ Skip extension method (documentation here).
Just try the sample below:
itemsList.ItemsSource = queue.Skip(1);
As well you can rewrite the query to omit the first item before applying the projection in the select method using the methods chain approach:
var queue = document.Descendants("item")
.Skip(1)
.Select(item => new Item
{
title = item.Element("title").Value,
link = item.Element("link").Value,
ThumbnailUrl = item.Element(item.GetNamespaceOfPrefix("media") + "thumbnail").Attribute("url").Value,
})
.ToList();
itemsList.ItemsSource = queue;
UPDATE / DUE TO COMMENTS
And as well if you need to skip items at certain indexes you may use the Where method and the HasSet as in the sample below:
var document = XDocument.Parse(e.Result);
var indexes = new HashSet<int> { 1, 3, 4 };
var queue = document.Descendants("item")
.Select(item => new Item
{
title = item.Element("title").Value,
link = item.Element("link").Value,
ThumbnailUrl =
item.Element(item.GetNamespaceOfPrefix("media") + "thumbnail").Attribute("url").Value,
})
.Where((x, i) => !indexes.Contains(i))
.ToList();
Items.ItemsSource = queue;