實現介面與顯示實現介面的區別

繼承介面有兩種實現方式：A:顯示實現介面，B:（隱式）實現介面
文筆太差，就寫這麼點吧，我自己也是一知半解，請各位多多補充，感謝
interface IAnimal  { 
          string Add(string name);
          string Delete(string name);    }

 class Dog:IAnimal
    {
        #region IAnimal 成員 
        //隱式實現介面
        public string Add(string name)
        {
            throw new Exception("The method or operation is not implemented.");
        }

        public string Delete(string name)
        {
            throw new Exception("The method or operation is not implemented.");
        }

        #endregion

        #region IAnimal 成員
        //顯示實現介面
        string IAnimal.Add(string name)
        {
            throw new Exception("The method or operation is not implemented.");
        }

        string IAnimal.Delete(string name)
        {
            throw new Exception("The method or operation is not implemented.");
        }

        #endregion
    }

B:(隱式)實現介面
string name="aa";
            Dog dy = new Dog();//隱式
            dy.Add(name);

A:顯示實現介面           
Dog d = new Dog();//顯示實現介面後調用方法
                  //需要進行類型轉換
            ((IAnimal)d).Add(name);
參考：
    http://topic.csdn.net/u/20070822/13/20161194-e05b-4a63-8b3b-51718f16dee8.html
     http://www.cnblogs.com/huashanlin/archive/2006/12/13/591129.html
     http://www.cnblogs.com/ericwen/archive/2007/12/28/1018181.html