private void FinishSavingArchive(object obj, LoadingStateChangedEventArgs args)
        {
            if (args.LoadingState == TaskLoadingState.Ready)
            {
                _archiveFileService.LoadingStateChanged -= FinishSavingArchive;

                _taskFileService.Sync();
            }
        }
		public void InvokeLoadingStateChanged(LoadingStateChangedEventArgs e)
		{
			var handler = LoadingStateChanged;
			handler?.Invoke(this, e);
		}
        private void ArchiveTasks(object obj, LoadingStateChangedEventArgs args)
        {
	        if (args.LoadingState != TaskLoadingState.Ready)
	        {
		        return;
	        }

	        _archiveFileService.LoadingStateChanged -= ArchiveTasks;

	        // TODO Have setting for preserving line numbers
	        var completedTasks = _taskFileService.TaskList.RemoveCompletedTasks(false);

	        foreach (var completedTask in completedTasks)
	        {
		        _archiveFileService.TaskList.Add(completedTask);
	        }

	        _archiveFileService.SaveTasks();
	        _taskFileService.SaveTasks();

	        _archiveFileService.LoadingStateChanged += FinishSavingArchive;

	        _archiveFileService.Sync();
        }