TestClass_Student

using System;
using System.Collections.Generic;
using System.Linq;

namespace LiveDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            Dictionary<Student, string> university = new Dictionary<Student, string>();

            string input = Console.ReadLine();

            while (input != "end")
            {
                string[] inputArr = input.Split();

                string name = inputArr[0];
                string surname = inputArr[1];

                Student student = new Student(name, surname);

                if (university.ContainsKey(student) == false)
                {
                    university.Add(student, "Bach ");
                }
                else
                {

                    university[student] += "Master";

                }

                input = Console.ReadLine();
            }


            foreach (var stud in university)
            {
                Console.WriteLine($"{stud.Key.Name} {stud.Key.Surname} ---- {stud.Value}");
            }

            Console.WriteLine(Student.Years);
        }
    }
    class Student
    {
        public string Name { get; set; }
        public string Surname { get; set; }

        public Student(string name)
        {
            this.Name = name;
        }

        public Student(string name, string surname)
        {
            this.Name = name;
            this.Surname = surname;
        }

        public static int Years
        {
            get
            {
                return 20;
            }
        }
    }
}