使用用dynamic添加外部DLL引用

var dogType = System.Reflection.Assembly.Load("bigs").GetType("bigs.big");//注意：命名空间加上类名！

            dynamic dog = Activator.CreateInstance(dogType);

            dog.Speak();



            dynamic expando = new System.Dynamic.ExpandoObject();

            expando.Name = "chenxiaofeng";

            expando.Speak = new Action(() => Console.WriteLine("My name is {0}", expando.Name));



            expando.Speak();