Display data from database based on condition in mvc4 with linq

public ActionResult Details(string id)
{

sample styles = db.samples.Single(x => x.AccNo == id);

return View(styles);
}

I want to display data based on AccNo(Value)

localhost:1652/Home/Details/123abc

but i am getting this error

what is the mistake in my code

ERRor:

An exception of type 'System.InvalidOperationException' occurred in System.Data.Linq.dll but was not handled in user code