Untitled

using System;

namespace HelloApp
{
    class Program
    {
        static void Main(string[] args)
        {
            string stringToShow1, stringToShow2;

            string surname = "Титов";
            string name = "Максим";
            string otchestvo = "Александрович";

            int age = 17;
            double weight = 60.0;

            stringToShow1 = surname + "\n" + name + "\n" + otchestvo + "\nВозраст: " + age + "\nВес: " + weight + "\n";

            surname = "Мильшин";
            name = "Олег";
            otchestvo = "Дмитриевич";

            age = 16;
            weight = 80;

            stringToShow2 = surname + "\n" + name + "\n" + otchestvo + "\nВозраст: " + age + "\nВес: " + weight;
            Console.WriteLine(stringToShow1);
            Console.WriteLine(stringToShow2);
        }
    }
}