Question

How to an object the same way as an array with indexer in C#

Answer 1

using System;

namespace ConsoleApplication_C_Sharp
{
    class Test
    {
        string[] _arr = new string[10]; 

        public string this[int i]
        {
            get
            {
                if (i >= 0 && i < _arr.Length)
                {
                    return _arr[i];
                }
                return "Index out of range: " + i;
            }
            set
            {
                if (i >= 0 && i < _arr.Length)
                {
                    _arr[i] = value;
                }
            }
        }
    }
    
    class Program
    {
        static void Main(string[] args)
        {
            Test t = new Test();

            t[1] = "c#";
            t[2] = "c";
            t[3] = "c++";
            t[4] = "java";

            t[-1] = "abc";
            t[11] = "xyz";

            Console.WriteLine(t[1]);
            Console.WriteLine(t[2]);
            Console.WriteLine(t[3]);
            Console.WriteLine(t[4]);

            Console.WriteLine(t[-1]); 
            Console.WriteLine(t[11]);
        }
    }
}


/*
run:
    
c#
c
c++
java
Index out of range: -1
Index out of range: 11

*/

 

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