4.6

using System;

namespace FifthProject
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] weapon = new string[1];
            string[] damage = new string[1];
            string[] rate = new string[1];

            int equiped = 0;

            while (true)
            {
                ShowEquiped(weapon,  damage, rate, equiped);

                Console.WriteLine("1. Добавить оружие.\n" +
                                  "2. Удалить оружие.\n" +
                                  "3. Экипировать оружие.\n");
                int menu = ConvertToInt();
                switch (menu)
                {
                    case 1:
                        AddNewWeapon(ref weapon, ref damage, ref rate);
                        break;
                    case 2:
                        DeleteWeapon(ref weapon, ref damage, ref rate);
                        break;
                    case 3:
                        Equip(ref equiped, weapon);
                        break;
                }
            }
        }

        static void ShowEquiped(string[] name, string[] damage, string[] rate, int equiped)
        {
            if (name.Length > 0)
            {
                Console.WriteLine($"Экипированно: {name[equiped]}\n" +
                                  $"Урон: {damage[equiped]}\n" +
                                  $"скорострельность: {rate[equiped]}\n");
            }
        }


        static void Equip(ref int equiped, string[] weapon)
        {
            ShowAllWeapons(weapon);
            equiped = ConvertToInt();
            if (equiped >= weapon.Length - 1)
            {
                equiped = 0;
            }
        }

        static void ShowAllWeapons(string[] name)
        {
            if (name.Length == 0)
            {
                Console.WriteLine("Empty list");
            }
            else
            {
                for (int i = 0; i < name.Length; i++)
                {
                    Console.WriteLine($"{i + 1}. {name[i]}");
                }
            }
        }

        static void AddNewWeapon(ref string[] name, ref string[] damage, ref string[] rate)
        {
            Console.Write("Введите название для оружие: ");
            AddNewParameter(ref name);
            Console.WriteLine("Введите урон оружия");
            AddNewParameter(ref damage);
            Console.WriteLine("Введите скорострельность оружия");
            AddNewParameter(ref rate);
        }

        static void AddNewParameter(ref string[] param)
        {
            string str = Console.ReadLine();
            string[] tempArr = new string[param.Length + 1];
            for (int i = 0; i < param.Length; i++)
            {
                tempArr[i] = param[i];
            }

            tempArr[tempArr.Length - 1] = str;

            param = tempArr;
        }

        static void DeleteWeapon(ref string[] name, ref string[] damage, ref string[] rate)
        {
            Console.WriteLine("Выберите слот для удаления");
            ShowAllWeapons(name);
            int deleteNumber = ConvertToInt();
            DeleteParameter(ref name, deleteNumber);
            DeleteParameter(ref damage, deleteNumber);
            DeleteParameter(ref rate, deleteNumber);
        }

        static void DeleteParameter(ref string[] arr, int deleteNumber)
        {
            string[] tempArr = new string[arr.Length - 1];
            arr[deleteNumber] = null;
            for (int i = 0; i < arr.Length - 1; i++)
            {
                if (arr[i] != null)
                {
                    tempArr[i] = arr[i];
                }
                else
                {
                    tempArr[i] = arr[i+1];
                }

            }

            arr = tempArr;
        }
        static int ConvertToInt()
        {
            int output;
            bool enterIsCorrect = false;
            do
            {
                string input = Console.ReadLine();
                enterIsCorrect = int.TryParse(input, out output);
                if (!enterIsCorrect)
                {
                    Console.WriteLine("Error enter. Try again");
                }
            } while (!enterIsCorrect);

            return output;
        }
    }
}