System.Xml.XmlWriter.WriteEndDocument C# (CSharp) Method

        public abstract void WriteEndDocument();

 private void Click_Save(object sender, RoutedEventArgs e)
 {
     System.Xml.XmlWriter writer = System.Xml.XmlWriter.Create(Environment.CurrentDirectory + @"\" + FileName);
     writer.WriteStartDocument();
     if (cvs.Children.Count != 0)
     {
         writer.WriteStartElement("Icons");
         foreach (var i in cvs.Children)
         {
             var im = (Image)i;
             writer.WriteStartElement("Icon");
             writer.WriteElementString("Source", im.Source + "");
             writer.WriteElementString("Width", im.Width + "");
             writer.WriteElementString("Height", im.Height + "");
             writer.WriteElementString("Left", im.GetValue(Canvas.LeftProperty) + "");
             writer.WriteElementString("Top", im.GetValue(Canvas.TopProperty) + "");
             writer.WriteEndElement();
             writer.Flush();
         }
         writer.WriteEndElement();
         writer.WriteEndDocument();
     }
     else
     {
         writer.WriteStartElement("Null");
         writer.WriteEndElement();
         writer.WriteEndDocument();
     }
     writer.Close();
     MessageBox.Show("Позиции иконок сохранены!", "Perfect", MessageBoxButton.OK, MessageBoxImage.Information);
 }