索引器的重载的一个例子

// --------------------------------------
//  索引器的重载
//  索引器永远属于实例成员，所以不能为static
// --------------------------------------
using  System;
using  System.Collections.Generic;
using  System.Collections;

namespace  indexoverLoad
{
     class  MainClass
    {
         public   static   void  Main( string [] args)
        {
            IndexClass indexclass  =   new  IndexClass();
            indexclass[ 0 ]  =   " 张三 " ;
            indexclass[ 1 ]  =   " 李四 " ;
            indexclass[ 2 ]  =   " 王五 " ;
            
            Console.WriteLine(indexclass[ 0 ]);
            Console.WriteLine(indexclass[ 1 ]);
            Console.WriteLine(indexclass[ 2 ]);
            
            IndexStringClass indexStringClass  =   new  IndexStringClass();
            indexStringClass[ 1 ]  =   " 001号 " ;
            indexStringClass[ 2 ]  =   " 002号 " ;
            indexStringClass[ 3 ]  =   " 003号 " ;
            
            Console.WriteLine(indexStringClass[ " 001号 " ]);
            Console.WriteLine(indexStringClass[ " 002号 " ]);
            Console.WriteLine(indexStringClass[ " 003号 " ]);
            
            Console.ReadKey();
        }
    }
     class  IndexClass
    {
         private   string [] name  =   new   string [ 10 ];
         public   string   this [ int  index]
        {
             get { return  name[index];}
             set
            {
                 if (index  >=   0   &&  index < 10 )
                    name[index]  =  value;
            }
            
        }
    }
     class  IndexStringClass
    {
         private  Hashtable name  =   new  Hashtable();
        
         public   string   this [ int  index]
        {
             get { return  name[index].ToString();}
             set
            {
                name.Add(index,value);
            }    
        }

         public   int   this [ string  _name]
        {
            
             get
            {
                 foreach  (DictionaryEntry d  in  name)
                {
                     if (d.Value.ToString()  ==  _name)
                    {
                         return  Convert.ToInt32(d.Key);
                    }
                }
                 return   - 1 ;
            }
             set
            {
                name.Add(value,_name);
            }
        }
        
    }
}