how to bind dropdown using foreign key in mvc - asp.net-mvc

Question

trying to bind the BrandName column drop down but i am unable to get it..can any one help me to get this.
Here is my code:
public class ApplicationUser : IdentityUser
{
[Column(Order = 1), ForeignKey("Brands")]
public int BrandId { get; set; }
public virtual Brands Brands { get; set; }
}
public class Brands
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Id { get; set; }
public string BrandName { get; set; }
public string ContactPerson { get; set; }
public string ContactNumber { get; set; }
}
controller code:
public ActionResult Register()
{
ViewBag.Name = new SelectList(context.Roles.Where(u => !u.Name.Contains("Admin"))
.ToList(), "Name", "Name");
return View();
}
Register.chstml code:
#using (Html.BeginForm("Register", "Account", FormMethod.Post, new { #class = "form-horizontal", role = "form" }))
{
#Html.AntiForgeryToken()
<h4>Create a new account.</h4>
<hr />
#Html.ValidationSummary()
<div class="form-group">
#Html.LabelFor(m => m.UserName, new { #class = "col-md-2 control-label" })
<div class="col-md-10">
#Html.TextBoxFor(m => m.UserName, new { #class = "form-control" })
</div>
</div>
<div class="form-group">
#Html.LabelFor(m => m.Password, new { #class = "col-md-2 control-label" })
<div class="col-md-10">
#Html.PasswordFor(m => m.Password, new { #class = "form-control" })
</div>
</div>
<div class="form-group">
#Html.LabelFor(m => m.ConfirmPassword, new { #class = "col-md-2 control-label" })
<div class="col-md-10">
#Html.PasswordFor(m => m.ConfirmPassword, new { #class = "form-control" })
</div>
</div>
<div class="form-group">
#Html.Label("User Role", new { #class = "col-md-2 control-label" })
<div class="col-md-10">
#Html.DropDownList("UserRoles", (SelectList)ViewBag.Name, " ", new { #class = "form-control" })
</div>
</div>
<div class="form-group">
#Html.Label("Brand Id", new { #class = "col-md-2 control-label" })
<div class="col-md-10">
#Html.DropDownList("BrandId",(SelectList)ViewBag.BrandNamenew,"",new{ #class = "form-control" })
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" class="btn btn-default" value="Register" />
</div>
</div>
}
how to write controller and cshtml code to bind BrandId dropdown