public FrameworkDbContext(DbContextOptions options)
            : base(options)
        {
        }
        public DbSet<Log> Logs { get; set; }
        protected override void OnModelCreating(ModelBuilder builder)
        {
            base.OnModelCreating(builder);

            // Logger Settings
            // build default model.
            LogModelBuilderHelper.Build(builder.Entity<Log>());

            // real relation database can map table:
            builder.Entity<Log>().ToTable("Log");

          }