Entity Framework 5是否支持唯一约束？

using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

public class Student
{
    public int Id { get; set; }

    [Index(IsUnique = true)]
    public string Name { get; set; }
}

using System.Data.Entity;
using System.Data.Entity.ModelConfiguration.Conventions;

public class MyContext : DbContext
{
    public DbSet<Student> Students { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
        modelBuilder.Entity<Student>().HasIndex(x => x.Name).IsUnique();
    }
}