HttpContext - Extended ObjectDisposedException handling

[snakefoot]

Suppresses ObjectDisposedException when HttpContext is no longer active (Avoid crashing when NLog users are wrongly using ThrowExceptions=true). Usually caused by NLog-users scheduling work on background-thread that is not awaited so it is runnng after HttpRequest has completed.

Alternative workaround to awaiting the background-task is to suppress the capture of thread-execution-context, so the HttpContext doesn't travel to the background-thread:

using (ExecutionContext.SuppressFlow())
{
    Task.Run(() => {});
}

The correct way of handling this is to ensure logging from non-awaited background-tasks doesn't reach Layout-logic that includes ${aspnet-request}-Layout-logic (Redirect to NLog targets with simple Layout-logic).

[sonarqubecloud]

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