C# 编程/关键字/from

上下文关键字from用于开始查询，例如，“from item in dataset”。紧接上下文关键字from之后是一个范围变量，表示数据集中的一个项目。要查询的数据集定义在上下文关键字in之后。另请参见ascending、descending、in、orderby、select和where。

C# 关键字
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# 特殊标识符（上下文关键字）
add alias async await dynamic get global nameof partial remove set value when where yield
上下文关键字（用于查询）
ascending by descending equals from group in into join let on orderby select where