Build.cs

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            webBrowser1.Navigate("https://login.live.com");
        }

        private async void webBrowser1_Navigated(object sender, WebBrowserNavigatedEventArgs e)
        {
            if ( e.Url == new Uri("https://account.microsoft.com/unsupported-browser"))
            {
                webBrowser1.Navigate("https://register.build.microsoft.com/auth/login");
            }
            if (webBrowser1.DocumentText == "Too Many Requests")
            {
                await Task.Delay(300);
                webBrowser1.Navigate("https://register.build.microsoft.com/auth/login");
            }
        }
    }