Getting Github Repo Star in C#

star.cs

using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

string[,] urlList =
{
    { "nim-lang", "Nim" },
    { "odin-lang", "Odin" },
    { "rust-lang", "rust" },
};

var tasks = new List<Task<(string owner, string repo, int? stars)>>();

int length = urlList.GetLength(0);
for (int i = 0; i < length; i++)
{
    string owner = urlList[i, 0];
    string repo = urlList[i, 1];

    tasks.Add(ProcessRepoAsync(owner, repo));
}

var results = await Task.WhenAll(tasks);

foreach (var result in results)
{
    if (result.stars.HasValue)
    {
        Console.WriteLine($"{result.owner}/{result.repo} - Star Count: {result.stars.Value}");
    }
    else
    {
        Console.WriteLine($"{result.owner}/{result.repo} - Failed to retrieve the number of stars");
    }
}

static async Task<(string owner, string repo, int? stars)> ProcessRepoAsync(
    string owner,
    string repo
)
{
    int? stars = await GetStar(owner, repo);
    return (owner, repo, stars);
}

static async Task<int?> GetStar(string owner, string repo)
{
    string url = $"https://github.com/{owner}/{repo}";

    using (HttpClient client = new HttpClient())
    {
        client.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64)");

        try
        {
            string html = await client.GetStringAsync(url);

            string pattern = @"<span id=""repo-stars-counter-star.+?title=""(.+?)"".+?</span>";

            Match match = Regex.Match(html, pattern);

            if (!match.Success)
            {
                return null;
            }

            var valueString = match.Groups[1].Value.Replace(",", "");

            if (int.TryParse(valueString, out int result))
            {
                return result;
            }
            return null;
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Error: {ex.Message}");
            return null;
        }
    }
}