Sets & Dictionaries Advanced - 3. Product Shop

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

namespace Advanced
{
    class Program
    {
        static void Main(string[] args)
        {
            var shops = new SortedDictionary<string, Dictionary<string, double>>();

            while (true)
            {
                var input = Console.ReadLine();

                if (input == "Revision")
                {
                    break;
                }

                var details = input.Split(", ");

                var shop = details[0];
                var product = details[1];
                var price = double.Parse(details[2]);

                if (!shops.ContainsKey(shop))
                {
                    shops[shop] = new Dictionary<string, double>();
                }

                shops[shop][product] = price;
            }

            foreach (var shop in shops)
            {
                var shopName = shop.Key;
                var products = shop.Value;

                Console.WriteLine($"{shopName}->");

                foreach (var product in products)
                {
                    Console.WriteLine($"Product: {product.Key}, Price: {product.Value}");
                }
            }
        }
    }
}