ASP.NET MVC registration form radio button

It took me a while to dig out how to use radio button on the registration form. 

In RegisterModel I have to add:

        [Required]

        [Display(Name = "Male/Female")]

        public string Gender { get; set; }

In Register.cshtml I have to add:

 <li>

            @Html.LabelFor(m => m.Gender)

            @Html.RadioButtonFor(model => model.Gender, "Male") Male

            @Html.RadioButtonFor(model => model.Gender, "Female") Female

    </li>

In site.css I have to add:

    input[type="radio"] {

   border: 0px;

    width: 1em;

    height: 1em;

     padding: 0px;

     margin-left: 0px;

}

You see below the radio button just displayed right:

Below is the SQL table change: (See yellow highlight)

You have to use Package manager console to update the database table, turn on the auto update, ...etc. (see link below about enable database migration:

http://msdn.microsoft.com/en-us/data/jj591621.aspx