Даниил Демидко

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace experience_with_tuples
{
    class Program
    {
        static void Main(string[] args)
        {
            var t = (1, "test", true);
            ConOut_tuple(job_with_tuple(t));
            // хотя можно и так. но не забываем про скобки
            ConOut_tuple(job_with_tuple((1, "test", true)));
        }

        static (int, string, bool) job_with_tuple((int, string, bool) t)
        {
            (var i, var s, var b) = t;
            i++;
            s += " successful";
            b = !b;
            return (i, s, b);
        }

        static void ConOut_tuple((int, string, bool) t) =>
            Console.WriteLine(
                t.Item1 + Environment.NewLine +
                t.Item2 + Environment.NewLine +
                $"detected errors: {t.Item3}"
                );
    }
}

public (int, int) MovePoint(int x, int y)
{
  // bla-bla-bla
  // изменения x, y
  return (x, y);
}
...
(var newX, var newY) = MovePoint(oldX, oldY);