Puppeteersharp with scrolling

using System;
using System.Threading;
using System.Threading.Tasks;
using PuppeteerSharp;
using System.Collections.Generic;

namespace netDemo
{
    public class Program
    {
        const string Username = "USERNAME";
        const string Password = "PASSWORD";
        static async Task Main(string[] args)
        {
            Console.WriteLine("Downloading Chrome");
            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);
            Console.WriteLine("Chrome is Current");
            
            var b = await Puppeteer.LaunchAsync(new LaunchOptions{
                Headless = false,
                Args = new[]{"--no-sandbox --disable-notifications"}
            });

            var p = await b.NewPageAsync();
            await p.Client.SendAsync("Emulation.clearDeviceMetricsOverride");
            await p.GoToAsync("Https://www.reddit.com/login");
            await p.WaitForSelectorAsync("fieldset.login");
            await p.ClickAsync("fieldset.login");
            await p.FocusAsync("fieldset.login :first-child");
            await p.Keyboard.TypeAsync(Username,new PuppeteerSharp.Input.TypeOptions{Delay=100});
            await p.FocusAsync("fieldset.password :first-child");
            await p.Keyboard.TypeAsync(Password,new PuppeteerSharp.Input.TypeOptions{Delay=100});
            await p.ClickAsync("button[type=\"submit\"");
            await p.WaitForNavigationAsync();
            await p.GoToAsync("Https://www.reddit.com/r/pics");
            await p.WaitForSelectorAsync("HEAD");
            
            Console.WriteLine("Preparing to scroll");
            Func<Task> scroll = null;
            
            scroll = new Func<Task>(async()=>{
                Console.WriteLine("Scrolling");
                await p.EvaluateExpressionAsync("window.scrollBy({top:10,behavior:'smooth'})"); 
                Thread.Sleep(100);
                await scroll();
            });

            await scroll();
            

        }
    }
}