using System;

​

enum Test

{

    Test1,

    Test2

}

​

;

public class Program

{

    static int Display(Test t)

    {

        return t switch

        {

            Test.Test1 => 2,

            Test.Test2 => 3,

            {} => 4,

        };

    }

​

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}