dotNetWebStudy/AspNetFrameworkMVC/AspNetCoreMVC/DataContext/ModelDbContext.cs

using AspNetCoreMVC.Models;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace AspNetCoreMVC.DataContext
{
    public class ModelDbContext : DbContext
    {
        public DbSet<Person> Persons { get; set; }
        public DbSet<User> Users { get; set; }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            string connectionString = "server=peacecloud.synology.me,21433;database=study;uid=study;pwd=Study1234";
            optionsBuilder.UseSqlServer(connectionString);
        }
    }
}