public FeedItemViewModel(FeedItem item)
 {
     FeedItem = item;
     Title = item.Title;
     Id = item.Id;
     Avatar = $"..\\Assets\\SourceLogos\\Circle\\{item.SourceId}.png";
 }
 public FeedItemViewModel(FeedItem item, bool isMarked) : this(item)
 {
     IsMark = isMarked;
 }
 public FeedItemViewModel(FeedItem item, bool isNew, bool isOld) : this(item)
 {
     IsNew = isNew;
     IsOld = isOld;
 }