int IComparable <ComparableTuple> .CompareTo(ComparableTuple other)
        {
            int myInt    = ToInt;
            int otherInt = other.ToInt;

            return(myInt < otherInt ? -1 : (myInt > otherInt ? 1 : 0));
        }
 bool IEquatable <ComparableTuple> .Equals(ComparableTuple other)
 {
     return(ToInt == other.ToInt);
 }