PuppeteerBoilerplate.cs

using PuppeteerSharp;
using System.Linq;
using System.Threading.Tasks;

namespace PuppeteerBoilerplate
{
    class Program
    {
        static async Task Main(string[] args)
        {
            var browserFetcherOptions = new BrowserFetcherOptions
            {
                Path = @"C:\my\puppeteer\folder",
            };

            RevisionInfo revisionInfo = await new BrowserFetcher(browserFetcherOptions).DownloadAsync(BrowserFetcher.DefaultRevision);
            
            var launchOptions = new LaunchOptions
            {
                Headless = true,
                ExecutablePath = revisionInfo.ExecutablePath,
            };

            using (var browser = await Puppeteer.LaunchAsync(launchOptions))
            using (var page = (await browser.PagesAsync()).First())
            {
                await page.GoToAsync("https://www.example.com");
                
                // Do stuff...
            }
        }
    }
}