Employees

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

namespace DefiningClasses
{
    public class StartUp
    {
        public static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            List<Employee> employees = new List<Employee>();

            for (int i = 0; i < n; i++)
            {
                string[] currEmployee = Console.ReadLine()
                .Split(' ')
                .ToArray();

                Employee emp = new Employee(currEmployee[0], decimal.Parse(currEmployee[1]), currEmployee[2], currEmployee[3]);

                if (currEmployee.Length == 5)
                {
                    if (currEmployee[4].Contains('@'))
                        {
                            emp.Email = currEmployee[4];
                        }
                    else
                        {
                            emp.Age = int.Parse(currEmployee[4]);
                        }
                }
                else if (currEmployee.Length == 6)
                {
                    emp.Email = currEmployee[4];
                    emp.Age = int.Parse(currEmployee[5]);
                }

                employees.Add(emp);
            }

            var topDept = employees.GroupBy(x => x.Department)
                .ToDictionary(x => x.Key, y => y.Select(s => s))
                .OrderByDescending(x => x.Value.Average(s => s.Salary))
                .FirstOrDefault();

            Console.WriteLine("Highest Average Salary: " + topDept.Key);

            foreach (var em in topDept.Value.OrderByDescending(x => x.Salary))
            {
                Console.WriteLine($"{em.Name} {em.Salary} {em.Email} {em.Age}");
            }
        }
    }
}