public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseBrowserLink();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }

            app.UseStaticFiles();

            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });

           SeedData.Seed(app);
        }

public static class SeedData
{
    public static void Seed(IApplicationBuilder app)
    {
        var _dbContext= app.ApplicationServices.GetRequiredService<BlogDbContext>();

        _dbContext.Database.EnsureDeleted();

        _dbContext.Add<User>(new User { UserName = "Niko", Password ="123",EmailAddress="nikozhao5456@gmail.com",UserType= Models.User.Type.Visitor,RegistDate=System.DateTime.Now});

        _dbContext.Add<Admin>(new Admin{EmailAddress="lovezgd888@163.com",Password="123"});

        _dbContext.SaveChanges();
    }
}