C# 程式設計/關鍵字/select

上下文關鍵字select用於確定在查詢結束時返回哪些變數，例如“from item in dataset select id”。緊接在上下文關鍵字select之後是一個表示式，它可能像每個返回專案的單個屬性或專案本身一樣簡單。表示式可以包含屬性列表，也可以是更復雜的表示式，將查詢的返回結果轉換為新的型別。

C# 關鍵字
abstract as base bool break byte case catch char checked class const continue decimal default delegate do double else enum event explicit extern false finally fixed float for foreach goto if implicit in int interface internal is lock long namespace new null object operator out override params private protected public readonly ref return sbyte sealed short sizeof stackalloc static string struct switch this throw true try typeof uint ulong unchecked unsafe ushort using var virtual void volatile while
C# 特殊識別符號（上下文關鍵字）
add alias async await dynamic get global nameof partial remove set value when where yield
上下文關鍵字（用於查詢）
ascending by descending equals from group in into join let on orderby select where