public void RemoveAreaItem(ContentsAreaItem areaItem) { if (ContentsCanvas != null & ContentsCanvas.Children.Contains(areaItem)) { ContentsCanvas.Children.Remove(areaItem); } }
public void AddAreaItem(ContentsAreaItem areaItem) { if (ContentsCanvas != null & !ContentsCanvas.Children.Contains(areaItem)) { ContentsCanvas.Children.Add(areaItem); } }