how to customize diagnostic? about diagnostics HOT 2 CLOSED

The ErrorPage is specifically designed as a development time debugging tool, not for production monitoring.

That said, it should be simple enough to write an error monitoring middleware. The core logic would look something like:

app.Use(async (context, next) =>
{
  try
  {
    await next();
  }
  catch (Exception ex)
  {
    SendErrorEmail(ex);
    throw;
  }
});

from diagnostics.

yes, I seen the sources of this package and is quite simple and understandable. I think the simpler things it's to write another middleware customizing the error Handling.

from diagnostics.