Retrieving Even-Numbered Events with the .NET Delegate Convention : Delegate event : Delegate C# Examples

    
using  System;
      
public  delegate  void  EvenNumberHandler(object  Originator,  OnEvenNumberEventArgs  EvenNumberEventArgs);
      
class  Counter
{
        public  event  EvenNumberHandler  OnEvenNumber;
      
        public  Counter()
        {
                OnEvenNumber  =  null;
        }
      
        public  void  CountTo100()
        {
                int  CurrentNumber;
      
                for(CurrentNumber  =  0;  CurrentNumber  <=  100;  CurrentNumber++)
                {
                        if(CurrentNumber  %  2  ==  0)
                        {
                                if(OnEvenNumber  !=  null)
                                {
                                        OnEvenNumberEventArgs  EventArguments;
      
                                        EventArguments  =  new  OnEvenNumberEventArgs(CurrentNumber);
                                        OnEvenNumber(this,  EventArguments);
                                }
                        }
                }
        }
}
      
public  class  OnEvenNumberEventArgs  :  EventArgs
{
        private  int  EvenNumber;
      
        public  OnEvenNumberEventArgs(int  EvenNumber)
        {
                this.EvenNumber  =  EvenNumber;
        }
      
        public  int  Number
        {
                get
                {
                        return  EvenNumber;
                }
        }
}
      
class  EvenNumberHandlerClass
{
        public  void  EvenNumberFound(object  Originator,  OnEvenNumberEventArgs  EvenNumberEventArgs)
        {
                Console.WriteLine(EvenNumberEventArgs.Number);
        }
}
      
class  MainClass
{
        public  static  void  Main()
        {
                Counter  MyCounter  =  new  Counter();
                EvenNumberHandlerClass  MyEvenNumberHandlerClass  =  new  EvenNumberHandlerClass();
                MyCounter.OnEvenNumber  +=  new  EvenNumberHandler(MyEvenNumberHandlerClass.EvenNumberFound);
                MyCounter.CountTo100();
        }
}