Visual Basic ASP.NET App Not Reporting Errors

[tankerkiller125]

We're working on adding Sentry to one of our legacy ASP.NET VB applications (using .NET 4.8) and so far it seems to be working OK (HTTP request timings are being sent), however when we attempt to send errors nothing comes over. We also looked through the Sentry debug and it seems that the error capture isn't firing at all.

Below is the code we have for our Global.asax.vb file:

Imports System
Imports System.Web
Imports Sentry
Imports Sentry.AspNet
Imports Sentry.Extensibility

Public Class MvcApplication
    Inherits HttpApplication

    Private _sentry As IDisposable

    Protected Sub Application_Start()
        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12
        _sentry = SentrySdk.Init(Function(o)
                                     o.Dsn = "https://dsn@self-host-sentry.tld/1"
                                     o.TracesSampleRate = 1.0
                                     o.AddAspNet()
                                     o.SendDefaultPii = True
                                     o.Debug = True
                                 End Function)
    End Sub

    Protected Sub Application_Error()
        Server.CaptureLastError()
    End Sub

    Protected Sub Application_BeginRequest()
        Context.StartSentryTransaction()
    End Sub

    Protected Sub Application_EndRequest()
        Context.FinishSentryTransaction()
    End Sub

    Protected Sub Application_End()
        _sentry?.Dispose()
    End Sub
End Class

We also tried:

SentrySdk.CaptureException(Server.GetLastError)

and that didn't seem to work either.

Any assistance would be greatly appreciated.

[mattjohnsonpint]

Transfered to #2232