private void RestoreDestinationLinks()
{
var firstUp = ElementsUp.First();
var destinationLinks = NumbersWithConnections[DestinationNumber];
if (ElementsUp.Last().Item1 == destinationLinks.Item1)
{
destinationLinks = new Tuple <int, int>(firstUp.Item2.Item1, destinationLinks.Item2);
}
NumbersWithConnections.Add(firstUp.Item1, new Tuple <int, int>(DestinationNumber, firstUp.Item2.Item2));
NumbersWithConnections[DestinationNumber] = new Tuple <int, int>(destinationLinks.Item1, firstUp.Item1);
}
