/// <summary> /// Load inking preference from file. A new one will be created none is loaded. /// This method will also create drawing attributes to be used by ink canvas. /// </summary> /// <returns></returns> public static async Task <InkingPreference> LoadDrawingPreference() { // Check drawing preference file AppEventSource.Log.Debug("ViewerPage: Checking previously saved drawing preference..."); StorageFile file = await SuspensionManager.GetSavedFileAsync(INKING_PREFERENCE_FILENAME); InkingPreference inkingPreference = await SuspensionManager.DeserializeFromFileAsync(typeof(InkingPreference), file) as InkingPreference; // Discard the inking preference if it is not the current version if (inkingPreference != null && inkingPreference.version != InkingPreference.CURRENT_INKING_PREF_VERSION) { inkingPreference = null; } // Create drawing preference file if one was not loaded. if (inkingPreference == null) { AppEventSource.Log.Debug("ViewerPage: No saved drawing preference loaded. Creating a new one..."); inkingPreference = new InkingPreference(); await inkingPreference.SaveAsync(); } return(inkingPreference); }