public   delegate   void   delegateHandler();     public   class   my     {           public   int   i=0;           public   delegateHandler   myhandle;           public   int   changeI           {                     get{
   return   i;}                     set{                             i=value;                             myhandle();                             }             }     }         public   class   otherclass     {           public   my   o;           public   otherclass()     {       o=new   my();     }     pulic   void   init()     {           o.myhandle+=new   delegateHandler(howtodeal);     }     public   void   howtodeal()     {           //你自己的处理程序     }                   }