Почему ошибка считаются: AddCapsInfo(); и Caps?

class Program
{
    SportInventory[] arr = new SportInventory[2];
    static void Main(string[] args)
    {
        AddBox();
    }
    public static void AddBox()
    {
        Console.WriteLine("what box inventory are you want adding:caps or gloves");
        string ans = Console.ReadLine();
        string manufactory;
        string name;
        string strenght;
        string matireal;
        int number;

        if (ans == "caps")
        {
            AddBoxInfo(out number, out  manufactory, out name, out strenght, out matireal);
            AddCapsInfo(number,  manufactory, name, strenght, matireal);
        }
        else if (ans == "gloves")
        {
            AddBoxInfo(out number, out manufactory, out name, out strenght, out matireal);
            AddGlovesInfo();
        }
        else
        {
            Console.WriteLine("Error!Check out entered name of inventory");
        }
    }
    public static void AddBoxInfo(out int number, out string manufactory, out string name, out string strenght, out string matireal)
    {
        Console.WriteLine("Enter number of your box inventory");
        number = int.Parse(Console.ReadLine());
        Console.WriteLine("Enter manufacture of your box inventory");
        manufactory = Console.ReadLine();
        Console.WriteLine("Enter name of your box inventory");
        name = Console.ReadLine();
        Console.WriteLine("Enter strenght of your box inventory");
        strenght = Console.ReadLine();
        Console.WriteLine("Enter material of your box inventory");
        matireal = Console.ReadLine();
    }
    public static void AddCapsInfo( int number,string prise,  string manufactory,  string name,  string strenght,  string matireal,  string type)
    {
        Console.WriteLine("Enter age group of your caps");
        int ageGroup = int.Parse(Console.ReadLine());
        Console.WriteLine("Enter type of your caps");
        string types = Console.ReadLine();
        SportInventory[] arr = new SportInventory[2];
        arr[0] = new Caps(name, prise, manufactory, number, strenght, matireal, ageGroup, type);
    }