static void Main(string[] args)
{
dynamic g = new Goal();
Console.WriteLine(g("al"));
Console.WriteLine(g()("al"));
Console.WriteLine(g()()("al"));
Console.WriteLine(g()()()()()()("al"));
}
public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
{
if (args.Length > 0)
{
result = val + args[0];
}
else
{
result = new Goal(val + "o");
}
return true;
}
