private void ListItemEdit_Click(object sender, RoutedEventArgs e)
{
var val = ((Button)sender).Tag;
AddItemWindow addItemWindow = new AddItemWindow(_currentListId, "Edit", (int)val);
addItemWindow.Show();
}
private void AddItem_Click(object sender, RoutedEventArgs e)
{
AddItemWindow addItemWindow = new AddItemWindow(_currentListId, "Add", 0);
addItemWindow.Show();
}