GitHub.Models.RepositoryHost.LogOut C# (CSharp) Method

        public IObservable<Unit> LogOut()
        {
            if (!IsLoggedIn) return Observable.Return(Unit.Default);

            log.Info(CultureInfo.InvariantCulture, "Logged off of host '{0}'", hostAddress.ApiUri);

            return loginCache.EraseLogin(Address)
                .Catch<Unit, Exception>(e =>
                {
                    log.Warn("ASSERT! Failed to erase login. Going to invalidate cache anyways.", e);
                    return Observable.Return(Unit.Default);
                })
                .SelectMany(_ => ModelService.InvalidateAll())
                .Catch<Unit, Exception>(e =>
                {
                    log.Warn("ASSERT! Failed to invaldiate caches", e);
                    return Observable.Return(Unit.Default);
                })
                .ObserveOn(RxApp.MainThreadScheduler)
                .Finally(() =>
                {
                    IsLoggedIn = false;
                });
        }