using System;

​

public class SwitchExprEx

{

    public static void Main()

    {

        string[] ary = new string[]{"春", "梅雨", "夏", "秋", "冬"};

        var random = new System.Random();

        var x = ary[random.Next(0, ary.Length)];

        var message = x switch {

            "春" => "Spring",

            "夏" => "Summer",

            "秋" => "Autumn",

            "冬" => "Winter",

            _ => throw new InvalidOperationException()

        };

        Console.WriteLine($"{x}は、英語で {message} です。");

    }

}