UserProfiles Model
[Table(\"Users\")] public class UserProfiles { [Key] [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)] public int
Add a SelectList to your ViewBag in the Controller:
ViewBag
ViewBag.ProfileId = new SelectList(db.UserProfiles, "Id", "Username");
then add this in your View:
@Html.DropDownList("ProfileId", String.Empty)
Moreover you should have used "model" instead of "Model" in your lambda expression.