ArcGISPortalViewer.Common.SuspensionManager.RestoreAsync C# (CSharp) Method

        public static async Task RestoreAsync()
        {
            _sessionState = new Dictionary<String, Object>();

            // Get the input stream for the SessionState file
            StorageFile file = await ApplicationData.Current.LocalFolder.GetFileAsync(sessionStateFilename);
            using (IInputStream inStream = await file.OpenSequentialReadAsync())
            {
                // Deserialize the Session State
                DataContractSerializer serializer = new DataContractSerializer(typeof(Dictionary<string, object>), _knownTypes);
                _sessionState = (Dictionary<string, object>)serializer.ReadObject(inStream.AsStreamForRead());
            }

            // Restore any registered frames to their saved state
            foreach (var weakFrameReference in _registeredFrames)
            {
                Frame frame;
                if (weakFrameReference.TryGetTarget(out frame))
                {
                    frame.ClearValue(FrameSessionStateProperty);
                    RestoreFrameNavigationState(frame);
                }
            }
        }