Insert an element into Collection at specified index in C#

To insert an element into Collection at the specified index, the code is as follows −

Example

 Live Demo

using System;
using System.Collections.ObjectModel;
public class Demo {
   public static void Main(){
      Collection<string> col = new Collection<string>();
      col.Add("Laptop");
      col.Add("Desktop");
      col.Add("Notebook");
      col.Add("Ultrabook");
      col.Add("Tablet");
      col.Add("Headphone");
      col.Add("Speaker");
      Console.WriteLine("Elements in Collection...");
      foreach(string str in col){
         Console.WriteLine(str);
      }
      Console.WriteLine("Element at index 3 = " + col[3]);
      Console.WriteLine("Element at index 4 = " + col[4]);
      col.Insert(5, "Alienware");
      Console.WriteLine("Elements in Collection...UPDATED");
      foreach(string str in col){
         Console.WriteLine(str);
      }
   }
}

Output

This will produce the following output −

Elements in Collection...
Laptop
Desktop
Notebook
Ultrabook
Tablet
Headphone
Speaker
Element at index 3 = Ultrabook
Element at index 4 = Tablet
Elements in Collection...UPDATED
Laptop
Desktop
Notebook
Ultrabook
Tablet
Alienware
Headphone
Speaker

Example

Let us now see another example −

 Live Demo

using System;
using System.Collections.ObjectModel;
public class Demo {
   public static void Main(){
      Collection<string> col = new Collection<string>();
      col.Add("Andy");
      col.Add("Kevin");
      col.Add("John");
      col.Add("Kevin");
      col.Add("Mary");
      col.Add("Katie");
      col.Add("Barry");
      col.Add("Nathan");
      Console.WriteLine("Elements in Collection...");
      foreach(string str in col){
         Console.WriteLine(str);
      }
      col.Insert(3, "Jacob");
      Console.WriteLine("Elements in Collection...UPDATED");
      foreach(string str in col){
         Console.WriteLine(str);
      }
   }
}

Output

This will produce the following output −

Elements in Collection...
Andy
Kevin
John
Kevin
Mary
Katie
Barry
Nathan
Elements in Collection...UPDATED
Andy
Kevin
John
Jacob
Kevin
Mary
Katie
Barry
Nathan