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C#/Linq で シーケンスの完全一致をチェックする

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2つのシーケンスの内容を比較して、それぞれの要素がもう片方に必ず存在することを確認する

using System.Collections.Generic;
using System.Linq;
public class Hello{
    public static void Main(){
        // Your code here!
        var l1 = new List<int>(){1,2};
        var l2 = new List<int>(){1,2};
        
        var result = l1.All(y => l2.Any(l => l == y)) && l2.All(y => l1.Any(l => l == y));
        System.Console.WriteLine(result);
    }
}

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