/// <summary>
/// Determines whether this instance [can add state].
/// </summary>
/// <returns>
/// <c>true</c> if this instance [can add state]; otherwise, <c>false</c>.
/// </returns>
private bool CanAddState()
{
var selectStateBlank = AvailableStates.GetItemAt(0);
return(SelectedState != null && selectStateBlank != null && !SelectedState.Equals(selectStateBlank));
}