ProperSave.SaveFileMetadata.AddIfNotExists C# (CSharp) Method

        internal static void AddIfNotExists(SaveFileMetadata metadata)
        {
            if (SavesMetadata.Contains(metadata))
            {
                return;
            }
            SavesMetadata.Add(metadata);
            UpdateSaveMetadata();
        }

        private static void SaveGame()
        {
            var save = ProperSavePlugin.CurrentSave = new SaveFile
            {
                SaveFileMeta = SaveFileMetadata.GetCurrentLobbySaveMetadata() ?? SaveFileMetadata.CreateMetadataForCurrentLobby()
            };

            if (string.IsNullOrEmpty(save.SaveFileMeta.FileName))
            {
                do
                {
                    save.SaveFileMeta.FileName = Guid.NewGuid().ToString();
                }while (File.Exists(save.SaveFileMeta.FilePath));
            }

            try
            {
                var json = JSONWriter.ToJson(save);
                File.WriteAllText(save.SaveFileMeta.FilePath, json);

                SaveFileMetadata.AddIfNotExists(save.SaveFileMeta);
                Chat.AddMessage(Language.GetString(LanguageConsts.PS_CHAT_SAVE));
            }
            catch (Exception e)
            {
                ProperSavePlugin.InstanceLogger.LogWarning("Failed to save the game");
                ProperSavePlugin.InstanceLogger.LogError(e);
            }
        }