重写OnModelCreating，控制生成表名的单复数

public class MYDbContext : DbContext
    {
        public DbSet<User> Users { get; set; }

        public TYDbContext()
            : base("name=MYEntities")
        {
        }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            //按model的名字生成表，而不是DbSet的名字
            modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
            base.OnModelCreating(modelBuilder);

        }
    }