How to filter a public IEnumerable<SelectListItem> with .Where?

Question

Very new to Net Core and CSharp, I am trying to filter a list before it posts

 

proposalVM.ProposalCategoryList = _unitOfWork.ProposalCategory.GetAll().OrderBy(s => s.ProposalCategoryName).Where(s => s.ProposalCategoryName != "Freight").Select(i => new SelectListItem

{

Text = i.ProposalCategoryName,

Value = i.ProposalCategoryId.ToString()

});

 

I don't get an error but neither does it filter the list. Any help is gratefully received.