expression trees permit lambda expressions to be represented as data structures instead of executable code 把代碼封裝為數據?還沒領會它的真正意圖是什么,好像也是為查詢表達式服務的。
lambda expressions, an evolution of anonymous methods that provides improved type inference and conversions to both delegate types and expression trees lambda表達式,匿名函數的一種進化,為代理類型和表達式樹提供改良的類型推斷結果和轉換。