first take your context entities as below
private Entities db = new Entities();
var city = db.cities.select(c => new { c.CityName , c.CityId}).OrderBy(c=> c.CityName);
db.citites.add(city);
db.SaveChanges();
for more information :-
http://onsaurav.blogspot.in/2013/02/beginning-of-entity-framework-with-mvc.html