using System;
using System.Reflection;
using Microsoft.Scripting;
using Microsoft.Scripting.Hosting;
using IronRuby;

namespace IronRubyTest1
{
    public class Human
    {
        protected string GetInternalCondition()
        {
            return "all good";
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            const string RubyCode = @"
class Doctor < IronRubyTest1::Human
  def check_condition()
    puts 'Condition: ' + get_internal_condition()
  end
end";
            ScriptRuntime runtime = Ruby.CreateRuntime();
            ScriptEngine engine = Ruby.GetEngine(runtime);
            ScriptScope scope = engine.CreateScope();

            //让 DLR 载入包含 Human 类的 Assembly
            runtime.LoadAssembly(Assembly.GetExecutingAssembly());
            engine.Execute(RubyCode, scope); //执行 Ruby 代码
            dynamic globals = engine.Runtime.Globals;
            dynamic house = globals.Doctor.@new(); //创建 Doctor 的实例
            house.check_condition();

            Console.WriteLine("Press any key to close...");
            Console.ReadKey();
        }
    }
}

代码下载：http://pastebin.com/0tHWuAmH

参考资料

http://www.voidspace.org.uk/ironpython/hosting_api.shtml#id2

《IronRuby In Action》