using System;

using System.Collections.Generic;

using System.Linq;

using System.Text.RegularExpressions;

public class Program

{

    private static bool WithSideEffects()

    {

        Console.WriteLine("SideEffect");

        return true;

    }

    private static void Cond(params (Func<bool>, Action)[] expressionStatements) =>

        expressionStatements.Where(e => e.Item1()).Select(e => e.Item2).FirstOrDefault()?.Invoke();

    public static void Main()

    {

        var i = 1;

        Cond(

            (() => i == 0, () => Console.WriteLine("0")),

            (() => WithSideEffects(), () => Console.WriteLine("1")),

            (() => i == 2, () => Console.WriteLine("2")),

            (() => WithSideEffects(), () => Console.WriteLine("3")),

            (() => true, () => Console.WriteLine("none"))

        );

    }

}