//..

static async Task<Browser> LaunchBrowserWithRandomProxy(List<string> proxies)
    {
         // Select a random proxy from the list
        var random = new Random();
        int randomIndex = random.Next(proxies.Count);

        string randomProxy = proxies[randomIndex];

        // Launch PuppeteerSharp with the selected proxy
        var browserFetcher = new BrowserFetcher();
        await browserFetcher.DownloadAsync();
        var browser = await Puppeteer.LaunchAsync(new LaunchOptions
        {
            Headless = true,
            Args = new[] { $"--proxy-server={randomProxy}" }
        });

        return (Browser)browser;

    }