using System;

​

public class Program

{

    public static void Main()

    {

        int val = 3;

        // switch and when up to C# 8

        switch (val)

        {

            case int x when x > 5 || x < 0:

                Console.WriteLine($"{x}>5 or {x}<0");

                break;

            case int x when x > 0 && x < 5:

                Console.WriteLine($"{x}>0 and {x}<5");

                break;

        }

        // switch and when from C# 8

        var value = val switch

        {

            int x when x > 5 || x < 0 => ($"{x}>5 or {x}<0"),

            int x when x > 0 && x < 5 => ($"{x}>0 and {x}<5"),

            _ => ("Error"),

        };

        Console.WriteLine(value);

    }

}

​