private static string GetFriendlyNameFromGameID(GameID gameID)
        {
            var gameIDStr = gameID.GetOfflineTwoPlayerGameID();
            var parts     = gameIDStr.Split(new char[] { '_' });

            System.Diagnostics.Debug.Assert(parts.Length == 2);
            System.Diagnostics.Debug.Assert(parts[1].EndsWith(_extension));
            return(parts[0]);
        }
        private static string GetFileNameFromGameID(GameID gameID)
        {
            var id = gameID.GetOfflineTwoPlayerGameID();

            return(id + _extension);
        }