OutOfMemoryException when trying to add items to ItemsControl when load in ItemsControl more items

OutOfMemoryException when trying to add items to ItemsControl when load in ItemsControl more items

I have a ItemsControl with ScrollViewer it shows newfeed. Answer why i do not use ListBox. I show 40-50 news, and then, I push the button, which updates newsfeed collection, and then - put it in ItemsControl. But I have OutOfMemoryException, and I can understand why. The method i use to get more newsfeed is the same method which loads data firsttime, so i think problem is not in it. But here is the code

        void c_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)     {         XDocument xml = XDocument.Load(e.Result);          App.WriteToIsoStorage(xml.ToString(), "items.xml");         App.New_From = (string)xml.Element("response").Element("new_from").Value;         var inf = from c in xml.Descendants("item")                    select c;         foreach (var item in inf)         {             if ((string)item.Element("type").Value != "friend" && item.Element("type").Value != "photo_tag" && (string)item.Element("type").Value != "photo" && item.Element("type").Value != "wall_photo")             {                 New new1 = new New();                 GetIds(item, new1, out new1);                 GetIcons(item, new1, out new1);                 if (item.Element("attachment") != null)                 {                     var vd = from c in item.Descendants("attachment")                                 select c;                     foreach (var content in vd)                     {                         if (content.Element("audio") != null) GetAudios(content, new1.audioAttachments, out new1.audioAttachments);                         if (content.Element("photo") != null && (string)item.Element("type").Value != "photo" && item.Element("type").Value != "wall_photo") GetPhotos(content, new1.photoAttachments, out new1.photoAttachments);                         if (content.Element("video") != null) GetVideos(content, new1.videoAttachments, out new1.videoAttachments);                         if (content.Element("link") != null) GetUrls(content, new1, out new1);                     }                 }                 if (item.Element("type").Value != "photo" && item.Element("type").Value != "wall_photo" && item.Element("type").Value != "photo_tag")                 NewsList.Add(new1);                 this.ItemsControl.Items.Add(new1);                 new1 = null;             }              IEnumerable<XElement> profiles = from c in xml.Descendants("user") //                                                  select c;             IEnumerable<XElement> groups = from c in xml.Descendants("group") //                                                  select c;             GetNames(profiles, groups);           }     } 

and here what VS shows

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