Add option to check if client has offline reports and send on demand

[bgxie]

From https://raygun.com/forums/thread/102887

If Raygun4Net can not send the report, then it will cache the report in isolated storage, as long as that's available. Raygun4Net will not listen to when a connection is restored, but instead will re-attempt sending cached reports the next time that a new report succeeds to be sent, or when the application starts up again.

Our clients are long running processes, potentially not restarting for very long times if the machine keeps running or the user Hibernates between sessions. We don't expect many errors, and if the error is only re-sent when the app starts or another error occurs we may not get it for weeks...

Our clients do detect restored connection and could send offline reports (if any) when coming back online

[QuantumNightmare]

Hi bgxie,

Thanks for posting this. We'll look into it for a future version of Raygun4Net.

-Jason Fauchelle