Shop question

using System;

namespace Clight_25_OOP_Shop
{
	class Program
	{
		static void Main(string[] args)
		{
			int numProductsInRow = 4;

			Product tomato = new Product("Помидоры", 15, 250);
			Product cucumber = new Product("Огурцы", 15, 200);
			Product potato = new Product("Картофель", 20, 100);
			Product orange = new Product("Апельсин", 7, 350);
			Product aplle = new Product("Яблоки", 13, 150);

			Shop vegetableShop = new Shop("Овощной", new Product[] { tomato, cucumber, potato, orange, aplle }, 0);

			//string name = SetName();
			string name = "Покупатель";
			Buyer buyer = new Buyer(name, new Product[0], 1000);

			vegetableShop.ShowProducts();
			buyer.ShowProducts();


			string SetName()
			{
				Console.WriteLine($"Добро пожаловать в магазин \"{vegetableShop.GetName()}\"");
				Console.Write("\nВведите свое имя: ");
				string name = Console.ReadLine();
				Console.Clear();
				return name;
			}
		}
	}

	interface IShoping
	{
		void DoShoping();
	}

	class Dealer
	{
		protected string _name;
		protected Product[] _products;

		public Dealer(string name, Product[] products)
		{
			_name = name;
			_products = products;
		}

		public void ShowProducts()
		{
			for (int i = 0; i < _products.Length; i++)
			{
				Console.Write((i + 1) + " ");
				_products[i].ShowProduct();
				Console.WriteLine("\n");
			}
		}

		public string GetName()
		{
			return _name;
		}
		public int GetLenghtProducts()
		{
			return _products.Length;
		}
	}
	class Shop : Dealer
	{
		protected int _income;

		public Shop(string name, Product[] products, int income) : base(name, products)
		{
			_income = income;
		}
	}

	class Buyer : Dealer, IShoping
	{
		protected int _wallet;

		public Buyer(string name, Product[] products, int wallet) : base(name, products)
		{
			_wallet = wallet;
		}

		public void DoShoping()
		{
			for (int i = 0; i < GetLenghtProducts(); i++)
			{
				products[i];
			}
		}
	}

	class Product
	{
		protected string _name;
		protected int _price;
		protected int _quantity;

		public Product(string name, int quantity, int price)
		{
			_name = name;
			_price = price;
			_quantity = quantity;
		}

		public void ShowProduct()
		{
			Console.Write($"{_name}\nКол-во: {_quantity} кг\nЦена: {_price} руб.");
		}
	}
}