/// <summary>
/// restores the data from disk if it is available
/// </summary>
/// <param name="dataStore">Data store.</param>
public void Load(FileDataStore dataStore)
{
dataStore.Load(_filename, this);
}
/// <summary>
/// flushes the data to disk
/// </summary>
/// <param name="dataStore">Data store.</param>
public void Flush(FileDataStore dataStore)
{
dataStore.Save(_filename, this);
}