Here, we will figure out how to get a component of Collection from the predetermined record in C#?
Given a Collection of integer types, and a list, we need to get to the component from the given file.
To get to a component of the Collection, we use Collection.Item[Int32 index] property.
Syntax:
Collection<T>.Item[Int32 index];
Note: It might return special case (ArgumentOutOfRangeException) if the list is either under 0 or more prominent than the check.
C# code to get to a component of Collection
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
class JustTechReview
{
public static void Main()
{
// declaring a collection of integers
Collection<int> iColl = new Collection<int>();
// adding elements to the collection
iColl.Add(100);
iColl.Add(200);
iColl.Add(300);
iColl.Add(400);
// displaying total number of elements
Console.WriteLine("Total number of elements: " + iColl.Count);
// displaying elements from given index
Console.WriteLine("Element at index " + 0 + " is: " + iColl[0]);
Console.WriteLine("Element at index " + 1 + " is: " + iColl[1]);
Console.WriteLine("Element at index " + 2 + " is: " + iColl[2]);
Console.WriteLine("Element at index " + 3 + " is: " + iColl[3]);
}
}
Output
Total number of elements: 4
Element at index 0 is: 100
Element at index 1 is: 200
Element at index 2 is: 300
Element at index 3 is: 400
Showing an Exception
Here, we will get to a component from – 1 file that will produce “ArgumentOutOfRangeException” special case.
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
class JustTechReview
{
public static void Main()
{
// declaring a collection of integers
Collection<int> iColl = new Collection<int>();
// adding elements to the collection
iColl.Add(100);
iColl.Add(200);
iColl.Add(300);
iColl.Add(400);
// displaying total number of elements
Console.WriteLine("Total number of elements: " + iColl.Count);
// displaying elements from given index
Console.WriteLine("Element at index " + 0 + " is: " + iColl[0]);
Console.WriteLine("Element at index " + 1 + " is: " + iColl[1]);
Console.WriteLine("Element at index " + 2 + " is: " + iColl[2]);
Console.WriteLine("Element at index " + 3 + " is: " + iColl[3]);
// displaying element from index "-1"
Console.WriteLine("Element at index " + -1 + " is: " + iColl[-1]);
}
}
Output
Total number of elements: 4
Element at index 0 is: 100
Element at index 1 is: 200
Element at index 2 is: 300
Element at index 3 is: 400
Unhandled Exception:
System.ArgumentOutOfRangeException: Index was out of range.
Must be non-negative and less than the size of the collection.
Parameter name: index
at System.ThrowHelper.ThrowArgumentOutOfRange_IndexException ()
[0x0000c] in <65984520577646ec9044386ec4a7b3dd>:0
at System.Collections.Generic.List`1[T].get_Item
(System.Int32 index) [0x00009] in <65984520577646ec9044386ec4a7b3dd>:0
at System.Collections.ObjectModel.Collection`1[T].get_Item (System.Int32 index)
[0x00000] in <65984520577646ec9044386ec4a7b3dd>:0
at JustTechReview.Main () [0x00129] in <775a4ba6f9ff4ee287095185056138d8>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.ArgumentOutOfRangeException:
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
at System.ThrowHelper.ThrowArgumentOutOfRange_IndexException ()
[0x0000c] in <65984520577646ec9044386ec4a7b3dd>:0
at System.Collections.Generic.List`1[T].get_Item (System.Int32 index)
[0x00009] in <65984520577646ec9044386ec4a7b3dd>:0
at System.Collections.ObjectModel.Collection`1[T].get_Item
(System.Int32 index) [0x00000] in <65984520577646ec9044386ec4a7b3dd>:0
at JustTechReview.Main () [0x00129] in <775a4ba6f9ff4ee287095185056138d8>:0