ArcGISPortalViewer.ViewModel.AppViewModel.AppInit C# (CSharp) Method

        public async Task AppInit(Frame rootFrame, LaunchActivatedEventArgs args)
        {
            if (args == null) return;

            _args = args;
            _rootFrame = rootFrame;

            // if network connection is not available, navigate to NetworkConnectivityPage 
            await Task.FromResult(CheckNetworkAvailability());
            if (!IsNetworkConnectionAvaliable)
            {
                if (!rootFrame.Navigate(typeof(NetworkConnectivityPage), args.Arguments))
                {
                    throw new Exception("Failed to navigate to network connectivity page");
                }
            }

            if (rootFrame.Content == null || IsNetworkConnectionAvaliable)
            {
                // When the navigation stack isn't restored navigate to the first page,
                // configuring the new page by passing required information as a navigation parameter

                // initialize static properties
                App.OrganizationUrl = GetKeyValueFromResources("OrganizationUrl").ToLower();
                App.PortalUri = new UriBuilder(string.Format(App.SharingRest, App.OrganizationUrl));
                App.AppServerId = GetKeyValueFromResources("AppServerId");
                App.AppRedirectUri = GetKeyValueFromResources("AppRedirectUri");
                App.IsOrgOAuth2 = !string.IsNullOrEmpty(App.AppServerId) && !string.IsNullOrEmpty(App.AppRedirectUri);

                // if credentials were persisted or anonymous access is enabled navigate to main page.                 
                if (App.SignInVM.IsCredentialsPersisted) // || SignInVM.IsAnonymousAccessEnabledAsync())
                {
                    if (!(rootFrame.Content is MainPage))
                    {
                        if (!rootFrame.Navigate(typeof (MainPage), args.Arguments))
                        {
                            throw new Exception("Failed to create initial page");
                        }
                    }
                    // try signing in 
                    await App.SignInVM.TrySigningInAsync();
                }
                else
                {
                    // if Anonymous access is enabled also navigate to main page
                    bool b = await App.SignInVM.GetAnonymousAccessStatusAsync();
                    if (b)
                    {
                        if (!(rootFrame.Content is MainPage))
                        {
                            if (!rootFrame.Navigate(typeof(MainPage), args.Arguments))
                            {
                                throw new Exception("Failed to create initial page");
                            }
                        }
                        // try signing in anonymously
                        await App.SignInVM.SignInAnonymouslyAsync();
                    }
                    // else challenge the user by navigating to the signing in page 
                    else
                    {
                        if (!rootFrame.Navigate(typeof(ArcGISBlankPage), args.Arguments))
                        {
                            throw new Exception("Failed to create login page");
                        }
                    }
                }
            }
        }