private void UserControl_Unloaded(object sender, RoutedEventArgs e)
{
MainContent.RemoveHandler(UIElement.TappedEvent, MainContentTappedHandler);
MainContentTappedHandler = null;
foreach (var c in LeftContent)
{
if (c is SidebarItem sb)
{
sb.PropertyChanged -= LeftItemPropertyChanged;
}
}
foreach (var c in RightContent)
{
if (c is SidebarItem sb)
{
sb.PropertyChanged -= RightItemPropertyChanged;
}
}
LeftContent = null;
RightContent = null;
}