private static void UpdateCache() { List <string> allPrefix = new List <string>(); foreach (var name in JavDataBaseManager.GetAllAVId().Select(x => x.ID).ToList()) { if (!allPrefix.Contains(name.Split('-')[0])) { allPrefix.Add(name.Split('-')[0]); ScanDataBaseManager.InsertPrefix(name.Split('-')[0]); } } }