public class MyFireWall:FireWallBase
             {
                 //avoid sending more than 1 email per url during the life of the web application
                 private readonly HashSet<Uri> _reported = new HashSet<Uri>();
                 ILogger<MyFireWall> _logger;
                 public MyFireWall(ILoggerFactory factory, IMemoryCache cache, ILatLongRepository geo)
                     : base(loggerFactory: factory, memoryCache: cache, latLongRepository:geo)
            
                 {
                     base.Trigger_OnFireWallCreated(this);
            
                     _logger = factory.CreateLogger<MyFireWall>();
                     OnResourceSend += MyFireWall_OnResourceSend;
                 }
            
            
                 private void MyFireWall_OnResourceSend(object sender, PageSendEventArgs e)
                 {
                      // if exception occurred and the url was not reported in this session
                      if (e.Request.Exception is not null && _reported.Add(e.Request.OriginalUrl))
                     {
                         var sb = new StringBuilder();
                         sb.AppendLine($"Page {e.Request.OriginalUrl} from {e.Request.Country} caused {e.Request.Exceptions.Count} exception(s)");
                         foreach (var item in e.Request.Exceptions)
                         {
            
                             sb.AppendLine($"    {item.GetType().Name} exception Message: {item.Message}");
                             sb.AppendLine($"    {item.ClassName()}.{item.MethodName()} in {item.FileName()}:{item.CodeLineNumber()}");
                             sb.AppendLine(item.StackTrace);
                             sb.AppendLine();
                         }
                         //helper class to send emails to developers, use your email implementation here
                         MailClient.SendDeveloperError(body: sb.ToString(),e.Request.ToString());
                     }
                 }
            
                 protected override void Dispose(bool disposing)
                 {
                     if (_reported.Count > 0)
                     {
                         _logger?.Lazy().LogWarning("The following {count} errors where recorded on these urls \n\t {urls}",_reported.Count, string.Join("\n\t", _reported.Select(s => s.PathAndQuery)));
                     }
                     base.Dispose(disposing);
                 }
             }
            
             internal class MailClient
             {
                 internal static void SendDeveloperError(string body, string subject)
                 {
                     try
                     {
                         using MailMessage mail = new MailMessage();
                         using SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
            
                         mail.From = new MailAddress("your_email_address@gmail.com");
                         mail.To.Add("to_address");
                         mail.Subject = subject;
                         mail.Body = body;
            
                         SmtpServer.Port = 587;
                         SmtpServer.Credentials = new System.Net.NetworkCredential("username", "password");
                         SmtpServer.EnableSsl = true;
            
                         SmtpServer.Send(mail);
                     }
                     catch { }
                 }
             }