如何从DbContext类继承

using Microsoft.EntityFrameworkCore;

namespace MyApp.Models
{
    public class MyDbContext : DbContext
    {
        public MyDbContext(DbContextOptions<MyDbContext> options)
            : base(options)
        {
        }

        public DbSet<Customer> Customers { get; set; }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder.UseSqlServer("Server=(localdb)\\mssqllocaldb;Database=mydb;Trusted_Connection=True;");
        }
    }
}

Add-Migration MyInitialMigration -Context MyDbContext

using (var context = new MyDbContext())
{
    context.Database.Migrate();
}