ISayHelloのInterfaceを引数に取る関数を作ってみる

namespace InterfaceExample
{
    class Program
    {
        static void Main(string[] args)
        {
            var helloList = new IGetHello[]
            {
                new CSharpHello()
                , new VBnetHello()
                , new FreeHello("Python")
                , new FreeHello("JavaScript"),
            };        helloList.ToList().ForEach(ShowConsole);
        Console.ReadLine();
    }
 
    static void ShowConsole(IGetHello sayHello)
    {
        Console.WriteLine(sayHello.GetHello());
 
    }
}