private void Window_Loaded_1(object sender, RoutedEventArgs e)
{
List<int> lst = new List<int>() { 1,2,3,4,5,6,7,8,9,10};
cmbSelect.ItemsSource = lst;
cmbSelect.SelectedIndex = 0;
(or)
foreach (var item in lst)
{
cmbSelect.Items.Add(item);
}
cmbSelect.SelectedIndex = 0;
}
Hope it helps you ...