Gets a data set consisting of a name and a rank.

Armament report

internal class Program
{
    public static void Main()
    {
        SoldierBaseUI application = new SoldierBaseUI();
        application.StartUI();
    }
}

class SoldierBaseUI
{
    private List<Soldier> _soldiers = new List<Soldier>
    {
        new Soldier("Soldier 1", "Fully equiped", "Capitan", new DateTime(2010, 5, 20)),
        new Soldier("Soldier 2", "Fully equiped", "lieutenant", new DateTime(2020, 6, 14)),
        new Soldier("Soldier 3", "Fully equiped", "Capitan", new DateTime(2012, 7, 19)),
        new Soldier("Soldier 4", "Fully equiped", "lieutenant", new DateTime(2018, 3, 12)),
        new Soldier("Soldier 5", "Fully equiped", "Capitan", new DateTime(2014, 9, 16)),
        new Soldier("Soldier 6", "Fully equiped", "lieutenant", new DateTime(2019, 12, 24)),
        new Soldier("Soldier 7", "Fully equiped", "lieutenant", new DateTime(2021, 10, 23)),
        new Soldier("Soldier 8", "Fully equiped", "General", new DateTime(2000, 11, 21)),
        new Soldier("Soldier 9", "Fully equiped", "General", new DateTime(2009, 8, 30)),
        new Soldier("Soldier 10", "Fully equiped", "Capitan", new DateTime(2017, 1, 23)),
    };

    public void StartUI()
    {
        Console.WriteLine("Soldiers: \nName _ Rank _ ");
        var soldierMainInfo = _soldiers.Select(soldier => new { soldier.Name, soldier.Rank }).ToArray();

        for(int i = 0; i < soldierMainInfo.Length; i++)
        {
            Console.WriteLine($"Name: {soldierMainInfo[i].Name}, Rank: {soldierMainInfo[i].Rank}");
        }

        Environment.Exit(0);
    }
}

class Soldier
{
    public Soldier(string name, string armament, string rank, DateTime dutyLengthInMonths)
    {
        Name = name;
        Armament = armament;
        Rank = rank;
        Months = ((DateTime.Now.Year - dutyLengthInMonths.Year) * 12) + DateTime.Now.Month - dutyLengthInMonths.Month;
    }

    public string Name { get; private set; }
    public string Armament { get; private set; }
    public string Rank { get; private set; }
    public int Months { get; private set; }
}