private void ItemDefinitions_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.NewItems != null)
{
foreach (var item in e.NewItems)
{
if (item is CommandBarItemDefinition itemDefinition)
{
if (ExcludedCommandDefinitions.Any(
x => x.GetType() == itemDefinition.CommandDefinition.GetType()))
{
ItemDefinitions.Remove(itemDefinition);
continue;
}
if (!itemDefinition.Group.Items.Contains(itemDefinition))
{
itemDefinition.Group.Items.AddSorted(itemDefinition,
new SortOrderComparer <CommandBarDefinitionBase>());
}
}
}
}
if (e.OldItems != null)
{
foreach (var item in e.OldItems)
{
if (item is CommandBarItemDefinition itemDefinition)
{
itemDefinition.Group.Items.Remove(itemDefinition);
}
}
}
}