Fetching data from database and populating a dropdownlist fr

public ActionResult AssignRole(long id = 0)     

{         

user UserModel = new user();         

int UserId = Convert.ToInt32(id);         

IList Users = new List();         

var query = from Role in db.Roles                     

join UserRole in db.UserRoles on Role.ID equals UserRole.RoleID                     

join user in db.users on UserRole.UserID equals user.id                     

where UserRole.UserID == UserId                     

select new { RoleName  = Role.RoleName, email = user.email, UserId = user.id };            

var userss = query.ToList();         

foreach(var userList in userss)         {             

Users.Add(new user()                 {                     

id = userList.UserId,                     

email = userList.email,                     

RoleName = userList.RoleName                 });         }          

LoadRoles(Users);         

return View(Users);     }  

public void LoadRoles(IList model)     

{          

var Roles = db.Roles.AsQueryable().Select(x => new SelectListItem()         

{              

Text = x.RoleName,             

Value = SqlFunctions.StringConvert((double) x.ID)         

}).ToList();          

var UserModel = new user()         

{             Roles = Roles.ToList()         

};      }

I am able to get other values from the LINQ in the first part of view but unable to populate the dropdownlist.

How can I populate the dropdownlist. I have tried so much but still no luck. Any urgent help will be appreciated.