WPF Binding - Find binding dependency property for all child elements

Following you can find example how we can find binding depandancy propertyfor all child elements. I usually use it when I use explicit binding mode and when I need to commit elements data changies, I go elements one by oneand perform UpdateSource(). Here is the code taht can perform UpdateSource for all child elements of parent element (for example: DataGrid ):

 public static void UpdateItemSource(FrameworkElement item)
 {
     FieldInfo[] infos = item.GetType().GetFields(BindingFlags.Public | 

                                        BindingFlags.FlattenHieratchy |

                                        BindingFlags.InstacFlags.Static);
     foreach (FieldInfo field in infos)
     {
         if (field.FieldType == typeof(DependencyProperty))
         {
           DependencyProperty dp = (DependencyProperty)field.GetValue(null);

           BindingExpression ex = item.GetBindingExpression(dp);
           if (ex != null)
           {                        
              if(ex.ParentBinding.UpdateSourceTrigger ==  Update SourceTrigg                                                              er.Explicit)

                        ex.UpdateSource();
                    }
                }
            }
          
            int count = VisualTreeHelper.GetChildrenCount( item);
            for (int i = 0; i < count; i++)
            {
                FrameworkElement child = VisualTreeHelper.GetChild(item, i)                                                 as FrameworkElement;

                if(child != null)
                    UpdateItemSource(child);
            }
        }