public SqlServerStateProvider(string nameOrConnectionStr)
        {
            DbContext = new SequenceDbContext(nameOrConnectionStr);

            DbSet = DbContext.Set<SqlServerSequence>();

        }
        public SqlServerStateProvider(string nameOrConnectionStr)
        {
            DbContext = new SequenceDbContext(nameOrConnectionStr);

            DbSet = DbContext.Set <SqlServerSequence>();
        }