ASP MVC Select statement error when trying to build dropdownlist

[q8yas]

The error: does not contain a definition for 'Select' and no extension method for 'Select' accepting a first argument of.....I seen this way used in a lot in examples, why does it hate my .select statement? I'm simply trying to build my dropdownlist and send it to the view.\[code\]IEnumerable<SelectListItem> items = db.Genres .Select(c => new SelectListItem { Value = http://stackoverflow.com/questions/15598930/c.gId.ToString(), Text = c.gName });ViewBag.gId = items;\[/code\]