Swapping Integer Values

class Program
    {
        static void Main()
        {

            int[] operatorValues = GetOperatorValues();

            var myClass = new Operator(operatorValues[0], operatorValues[1]);
            var swapResult = myClass.SwapValues();
            Console.WriteLine($"{swapResult.a} {swapResult.b}");
        }

        private static int[] GetOperatorValues()
        {
            int counter = 0;
            bool isNum;

            int[] result = new int[2];

            while (counter < 2)
            {
                var input = Console.ReadLine();
                isNum = int.TryParse(input, out int num);

                if (isNum)
                {
                    result[counter++] = num;
                }
            }

            return result;
        }

public class Operator
    {

        public Operator(int a, int b)
        {
            this.A = a;
            this.B = b;
        }

        public int A { get; private set; }

        public int B { get; private set; }

        public (int a, int b) SwapValues()
        {
            this.B += this.A;
            this.A = this.B - this.A;
            this.B -= this.A;

            return (this.A, this.B);
        }
    }