private void EditButton_Click(object sender, RoutedEventArgs e)
{
ListViewView listView = FocusedTabControl.SelectedContent as ListViewView;
TreeListView treeListView = FocusedTabControl.SelectedContent as TreeListView;
if (listView != null)
{
listView.Edit();
}
else
{
treeListView.Edit();
}
RefreshTabs();
}