public AApp ModifyApp(AApp app)
        {
            var dapp = app as CoreModel.CDefualtApp;

            using (var dbstore = new DB.AppDbContext())
            {
                dbstore.Update(dapp);
                dbstore.SaveChanges();
            }
            return(dapp);
        }
        public AApp CreateApp(AApp app)
        {
            var dapp = app as CoreModel.CDefualtApp;

            using (var db = new DB.AppDbContext())
            {
                db.Apps.Add(dapp);
                db.SaveChanges();
            }
            return(dapp);
        }