EF Code-first IsUnique()

gistfile1.txt

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations.Schema;
using System.Data.Entity.Infrastructure.Annotations;
using System.Data.Entity.ModelConfiguration.Configuration;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Imflow.Data
{
    public static class MappingExtensions
    {
        public static PrimitivePropertyConfiguration IsUnique(this PrimitivePropertyConfiguration configuration)
        {
            return configuration.HasColumnAnnotation("Index", new IndexAnnotation(new IndexAttribute { IsUnique = true }));
        }
    }
}