public void ChildChanged(object sender, ChangedEventArgs e)
 {
     if (this.Changed != null)
         this.Changed(sender, e);
 }
 public void ChildChanged(object sender, ChangedEventArgs e)
 {
     if (sender is IReportChange)
     {
         IReportChange Child = (IReportChange)sender;
         this.HasChanged = Child.HasChanged;
     }
 }