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Understanding IndexOutOfRangeException Exception in C#
It occurs when Index is outside the bounds of the array.
Let us see an example. We have declare an array with 5 elements and set the size as 5.
int[] arr = new int[5]; arr[0] = 10; arr[1] = 20; arr[2] = 30; arr[3] = 40; arr[4] = 50;
Now, we try to add the value of an element that extends the size of our array i.e.
arr[5] = 60;
Above, we are trying to add element at 6th position.
Example
using System;
using System.IO;
using System.Collections.Generic;
namespace Demo {
class Program {
static void Main(string[] args) {
int[] arr = new int[5];
arr[0] = 10;
arr[1] = 20;
arr[2] = 30;
arr[3] = 40;
arr[4] = 50;
arr[5] = 60; // this shows an error
}
}
}Output
The following is the output. It shows the following error −
Unhandled Exception: System.IndexOutOfRangeException: Index was outside the bounds of the array.
Updated on: 13-Apr-2020
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