codetojoy

using System.IO;
using System;
using System.Collections.Generic;

abstract class Animal {
    abstract public Animal Poke();
    
    public Animal Poke(String s) {
        Console.WriteLine("TRACER Poked " + s);
        return this;

codetojoy

// NOT idiomatic C#
// works in http://www.tutorialspoint.com/compile_csharp_online.php
using System.IO;
using System;
using System.Collections.Generic;

enum ConditionalThing { State_A, State_B, State_C };

interface AppropriateReturnType {
    AppropriateReturnType process(ConditionalThing state);

codetojoy

new File(args[1]).withWriter { def writer ->
    new File(args[0]).readLines().sort().each { writer.println(it) }
}