Random Item generator error [duplicate]

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• Index (zero based) must be greater than or equal to zero 4 answers

Okay so basically, I'm making a random item generator for a class project. Right now the Name generating part doesn't work once it hits 3 or more names. The error I get is:

FormatExeption was Unhandled An unhandled exception of type 'System.FormatException' occurred in mscorlib.dll

Additional information: Index (zero based) must be greater than or equal to zero and less than the size of the argument list

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication4
{
    class Program
    {
    public static string ID { get; set; }
    public static int Damage { get; set; }
    public static int Defense { get; set; }
    public static string Name;
    public static string Rarity;
    public static int NumberOfNames;
    public static string ItemType;
    public static Random Random = new Random();
    public static List<string> ItemTypeList = new List<string> { "Chest area armor", "Weapon", "Shield", "Head area armor", "Leggings", "Shoes", "Gloves", "Belt", "Ring" };
    public static List<string> WeaponList = new List<string> { "Staff", "Sword", "Dagger", "Wand", "Axe", "Mace" };
    public static List<string> Value1 = new List<string> { "Wooden", "Bronze" };
    public static List<string> Value2 = new List<string> { "Silver", "Steel" };
    public static List<string> Value3 = new List<string> { "Dragon Glass", "Adamantium", "Titanium", "Arcane", };
    public static List<string> ArmorValue = new List<string> { "Cloth", "Leather", "Iron", "Silver", "Steel", "Titanium", "Arcane", "Dragon Glass", "Titanium" };
    public static List<string> Name1 = new List<string> { "Stupid", "Great", "Powerful", "Epic", "Masterfull", "Mighty", "Bountiful", "Foreverlasting", "Pointless", "Useless" };
    public static List<string> Name2 = new List<string> { "Things", "Power", "Proportions", "Torment", "Legs", "Turnament", "Shit", "Crazyness", "Awesomeness" };
    public static List<string> NameLenght3List = new List<string> { "Ragnarok", "Power", "Bondage", "Noobs", "Great Weakness", "Error", "404", "Torture", "SHIT STATS(No idea since I'm not good enough to programm stats based on names)", "The Dark Lord", "Emperor", "Monkey Kong", "I ran out of words", "Blablabla" };

    public static string ItemGenerator(int droprarity)
    {
        int dropRarity = droprarity;
        NumberOfNames = NumberOfNamesGenerator(dropRarity);
        Console.WriteLine(NumberOfNames);
        Rarity = RarityGenerator(dropRarity);
        ItemType = ItemTypeGenerator();
        if (ItemType == "Sword")
        {
            ItemType = WeaponList[Random.Next(0, WeaponList.Count)];
        }
        Name = NameGenerator();
        return Name;

    }
    public static string RarityGenerator(int dropRarity)
    {
        switch (dropRarity)
        {
            case 1:
                Rarity = "Poor";
                break;
            case 2:
                Rarity = "Common";
                break;
            case 3:
                Rarity = "Uncommon";
                break;
            case 4:
                Rarity = "Elite";
                break;
            case 5:
                Rarity = "Rare";
                break;
            case 6:
                Rarity = "Legendary";
                break;
        }

        return Rarity;
    }
    public static string ItemTypeGenerator()
    {
        return string.Format("{0}", ItemTypeList[Random.Next(0, ItemTypeList.Count)]);
    }
    public static int NumberOfNamesGenerator(int dropRarity)
    {
        switch (dropRarity)
        {
            case 1:
                NumberOfNames = 2;
                break;
            case 2:
                NumberOfNames = Random.Next(2, 4);
                break;
            case 3:
                NumberOfNames = Random.Next(2, 4);
                break;
            case 4:
                NumberOfNames = Random.Next(2, 5);
                break;
            case 5:
                NumberOfNames = Random.Next(2, 5);
                break;
            case 6:
                NumberOfNames = Random.Next(2, 6);
                break;
        }
        return NumberOfNames;
    }
    public static string NameGenerator()
    {
        int nameNR = NumberOfNames;
        if (nameNR == 2)
        {
            return string.Format("{0} {1}", Rarity, ItemType);
        }
        else if (nameNR == 3)
        {
            return string.Format("{0} {1} of {3}", Rarity, ItemType, NameLenght3List[Random.Next(0, NameLenght3List.Count)]);
        }
        else if (nameNR == 4)
        {
            return string.Format("{0} {1} of {3} {4}", Rarity, ItemType, Name1[Random.Next(0, Name1.Count)], Name2[Random.Next(0, Name2.Count)]);
        }
        else if (nameNR == 5)
        {
            return string.Format("{0} {1} of {3} {4} {5}", Rarity, ItemType, Name1[Random.Next(0, Name1.Count)], Name1[Random.Next(0, Name1.Count)], Name2[Random.Next(0, Name2.Count)]);
        }
        else if (nameNR == 6)
        {
            return string.Format("{0} {1} of {3} {4} {5} {6}", Rarity, ItemType, Name1[Random.Next(0, Name1.Count)], Name1[Random.Next(0, Name1.Count)], Name1[Random.Next(0, Name1.Count)], Name2[Random.Next(0, Name2.Count)]);
        }
        else
        {
            string ErrorSword = "Error Sword/Armor/blablabla";
            return ErrorSword;
        }
    }
    static void Main(string[] args)
    {
        int number;
        number = Random.Next(1, 6);
        Name = ItemGenerator(number);
        Console.WriteLine(Name);
        Console.ReadLine();;
    }
    }
}

The error Occurs at public static string NameGenerator()