C# 程式設計/關鍵字/from

上下文關鍵字from用於開始查詢，例如，“from item in dataset”。緊接上下文關鍵字from之後是一個範圍變數，表示資料集中的一個專案。要查詢的資料集定義在上下文關鍵字in之後。另請參見ascending、descending、in、orderby、select和where。

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