LINQ擴展方法中括號的影響查詢

Question

如果我在queryable和OrderByDescending(...)（和之前的Take(1)）之前留下括號或刪除它們，是否有區別？爲什麼或者爲什麼不？

public static IQueryable<IEffectiveDated> GetCurrent(this IQueryable<IEffectiveDated> queryable, DateTime asOfDate) 
{   
    return (queryable 
     .Where(e => e.EffectiveDate <= asOfDate) 
     .OrderByDescending(e => e.EffectiveDate)) 
     .Take(1);  
} 

Answer 1

這種情況沒有什麼區別。換句話說：

return (queryable 
    .Where(e => e.EffectiveDate <= asOfDate) 
    .OrderByDescending(e => e.EffectiveDate)) 
    .Take(1); 

是相同的：

return queryable 
    .Where(e => e.EffectiveDate <= asOfDate) 
    .OrderByDescending(e => e.EffectiveDate) 
    .Take(1); 

後者可能是更清潔，更顯示了LINQ的鏈接。