/// <summary>
/// Adds a new element to the combo
/// </summary>
/// <param name="item">item to add</param>
/// <param name="index">position to adding</param>
public int AddItem(object item, int index = -1)
{
var newItem = CreateItem(item);
if (index == -1 || index == ListBoxItems.Count)
{
ListBoxItems.Add(newItem);
return(ListBoxItems.Count - 1);
}
ListBoxItems.Insert(index, newItem);
return(index);
}
private void OnAddItemCommandExecute()
{
ListBoxItems.Insert(0, CreateUser());
}