public Make AddMake(string makeName, int adminId) { Make newMake = new Make(); newMake.MakeId = Makes.Max(i => i.MakeId) + 1; newMake.MakeName = makeName; newMake.AdminId = adminId; newMake.Created = DateTime.Now; Makes.Add(newMake); (this).SaveChanges(); return(newMake); }