linq.cs

from x in list
where x
let y = new { X = x }
orderby y.X
select y;

orig.cs

list.Where(x => x)
  .Select(x => new 
  {
    X = x
  })
  .OrderBy(x => x);

typo.cs

list.
    Where(x => x).
    Select(x => new { X = x }).
    OrderBy(x => x.X);