EF mysql

namespace MySqlCodeFirstDemo
{
    [DbConfigurationType(typeof(MySql.Data.Entity.MySqlEFConfiguration))]  //可以执行mysql代码使之生效
    public class MySqlContext : DbContext
    {
        public DbSet<User> Users { get; set; }
    }
 
    public class User
    {
        [Key]
        public int Id { get; set; }
        [MaxLength(255)]
        public string Name { get; set; }

   internal sealed class Configuration : DbMigrationsConfiguration<MySqlCodeFirstDemo.MySqlContext>
    {
        public Configuration()
        {
            AutomaticMigrationsEnabled = false;
 
            // register mysql code generator
            SetSqlGenerator("MySql.Data.MySqlClient", new MySql.Data.Entity.MySqlMigrationSqlGenerator()); //加上这句不知道有啥用 ,不加也没事
        }
        protected override void Seed(MySqlCodeFirstDemo.MySqlContext context)
        {