Emoji Detector [C#]

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

namespace EmojiDetector
{
    class Program
    {
        static void Main(string[] args)
        {
            string text = Console.ReadLine();

            Dictionary<string, int> dictionary = new Dictionary<string, int>();

            long thresHold = 1;

            for (int i = 0; i < text.Length; i++)
            {
                if (char.IsDigit(text[i]))
                {
                    thresHold *= int.Parse(text[i].ToString());
                }
            }

            string emojiPattern = @"([*]{2}|[:]{2})(?<letters>[A-Z][a-z]{2,})\1";

            MatchCollection emojies = Regex.Matches(text, emojiPattern);

            int coolness = 0;

            for (int i = 0; i < emojies.Count; i++)
            {
                string emoji = emojies[i].Groups["letters"].Value;

                for (int j = 0; j < emoji.Length; j++)
                {
                    coolness += emoji[j];
                }

                if (!dictionary.ContainsKey(emojies[i].Value))
                {
                    dictionary.Add(emojies[i].Value, coolness);

                }

                coolness = 0;
            }

            int countTotalEmojies = dictionary.Count;

            dictionary = dictionary.Where(x => x.Value > thresHold).ToDictionary(x => x.Key, x => x.Value);

            Console.WriteLine($"Cool threshold: {thresHold}");
            Console.WriteLine($"{countTotalEmojies} emojis found in the text. The cool ones are:");

            foreach (var item in dictionary)
            {
                Console.WriteLine(item.Key);
            }
        }
    }
}