/// <summary>
	/// Close the default session.
	/// </summary>
	/// <returns>True if successfully closed session.</returns>
	public static bool CloseDefaultSession()
	{
	    bool bResult = true;
	    // Try to reconnect to session if _sessionObj is null.
	    if (_defaultSession != null || LoadStoredDefaultSession())
	    {
		bResult = _defaultSession.CloseSession();
		_defaultSession = null;
	    }
	    return bResult;
	}