C# (CSharp) ReferenceList.Where примеры использования

Пример #1

 public IEnumerable <Reference> SelectReferenceByGoodId(int goodId)
 {
     return(ReferenceList.Where(x => x.GoodId == goodId));
 }

Пример #2

 public IEnumerable <Reference> SelectReferenceByCategoryId(int categoryId)
 {
     return(ReferenceList.Where(x => x.CategoryId == categoryId));
 }