Supporting foreach with IEnumerable and IEnumerator : IEnumerable : Class C# Examples

    
using  System;
using  System.Collections;
      
class  Rainbow  :  IEnumerable,  IEnumerator
{
        private  short  IteratorIndex  =  -1;
      
        public  IEnumerator  GetEnumerator()
        {
                return  this;
        }
      
        public  object  Current
        {
                get
                {
                        switch(IteratorIndex)
                        {
                                case  0:
                                        return  "Red";
                                case  1:
                                        return  "Orange";
                                case  2:
                                        return  "Yellow";
                                case  3:
                                        return  "Green";
                                case  4:
                                        return  "Blue";
                                case  5:
                                        return  "Indigo";
                                case  6:
                                        return  "Violet";
                                default:
                                        return  "***  ERROR  ***";
                        }
                }
        }
      
        public  bool  MoveNext()
        {
                IteratorIndex++;
                if(IteratorIndex  ==  7)
                        return  false;
                return  true;
        }
      
        public  void  Reset()
        {
                IteratorIndex  =  -1;
        }
      
        public  static  void  Main()
        {
                Rainbow  MyRainbow  =  new  Rainbow();
      
                foreach(string  ColorName  in  MyRainbow)
                        Console.WriteLine(ColorName);
        }
}