哪裡

返回指定謂詞為 true 的項的子集。

List<string> trees = new List<string>{ "Oak", "Birch", "Beech", "Elm", "Hazel", "Maple" };

方法語法

// Select all trees with name of length 3
var shortTrees = trees.Where(tree => tree.Length == 3); // Oak, Elm

查詢語法

var shortTrees = from tree in trees
                 where tree.Length == 3
                 select tree; // Oak, Elm