Here, we will demonstrate the practical use of Indexers in C# Programming Language

1. Indexers are one flawless component of C#. They
permit us to get to a specific class as it is an
array. They are like the properties such that they
typify or encapsulate the calls to the methods
into more advantageous representation of quality
accessing in setting the values. In order to
declare a property, we can use it by the name.
The indexer is no more dissimilar to class, so it
exhibits a type, i.e. you need to pronounce a
variable of its sort (by instantiating the object
type). Indexers are likewise called smart arrays in
C# and can be utilized to regard our object as
an array(a type having elements of same type).
An indexer permits a class instance or a struct to
be indexed like the way through which the array
is accessed by LOOPING etc

2. using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace IndexerExample
{
public class WelcomeMessage
{
public static string[] messageelements = new string[5];
public WelcomeMessage()
{
for (int i = 0; i < messageelements.Length; i++)
messageelements[i] = String.Format("{0}", i);
}

3. public string this[ int myIndexer]
{
get
{
string tmp;
if (myIndexer >= 0 && myIndexer <=
messageelements.Length - 1)
tmp = messageelements[myIndexer];
else
tmp = "";
return (tmp);
}
set
{
if (myIndexer >= 0 && myIndexer <=
messageelements.Length - 1)
messageelements[myIndexer] = value;
}
}}

4. public class Program
{
public static void Main()
{
WelcomeMessage elements = new WelcomeMessage();
elements[0] = "Hello! ";
elements[1] = "How ";
elements[2] = "are ";
elements[3] = "you ";
elements[4] = "today?";
for (int i = 0; i < WelcomeMessage.messageelements.Length; i++)
Console.Write(elements[i]);
Console.ReadLine();
}
}
}

5. Hello! How are you today?