How to capture index out of range exception in C#?

IndexOutOfRangeException occurs when you try to access an element with an index that is outsise the bounds of the array.

Let’s say the following is our array. It has 5 elements −

int [] n = new int[5] {66, 33, 56, 23, 81};

Now if you will try to access elements with index more than 5, then the IndexOutOfRange Exception is thrown −

for (j = 0; j < 10; j++ ) {
Console.WriteLine("Element[{0}] = {1}", j, n[j]);
}

In the above example, we are trying to access above index 5, therefore the following error occurs −

System.IndexOutOfRangeException: Index was outside the bounds of the array.

Here is the complete code −

Example

 Live Demo

using System;

namespace Demo {
   class MyArray {
      static void Main(string[] args) {
         try {
            int [] n = new int[5] {66, 33, 56, 23, 81};
            int i,j;
            // error: IndexOutOfRangeException
            for (j = 0; j < 10; j++ ) {
               Console.WriteLine("Element[{0}] = {1}", j, n[j]);
            }
            Console.ReadKey();
         } catch (System.IndexOutOfRangeException e) {
            Console.WriteLine(e);
         }
      }
   }
}

Output

Element[0] = 66
Element[1] = 33
Element[2] = 56
Element[3] = 23
Element[4] = 81
System.IndexOutOfRangeException: Index was outside the bounds of the array.
at Demo.MyArray.Main (System.String[] args) [0x00019] in <6ff1dbe1755b407391fe21dec35d62bd>:0

The code will generate an error −

System.IndexOutOfRangeException −Index was outside the bounds of the array.