public static void AddScheduleMasterDb(this IServiceCollection services)
        {
            var service       = services.First(x => x.ServiceType == typeof(IConfiguration));
            var configuration = (IConfiguration)service.ImplementationInstance;

            if (service.ImplementationInstance == null)
            {
                configuration = (IConfiguration)service.ImplementationFactory(null);
            }
            ConfigurationHelper.Config = configuration;

            services.AddScoped <ISqlContext, SmDbContext>();
            services.AddScoped <SmDbContext>();
            using (var ctx = new SmDbContext())
            {
                ctx.InitTables();
            }
        }