How to insert the elements of a collection into the List at the specified index in C#?

To insert the elements of a collection into the List at the specified index, the code is as follows −

Example

 Live Demo

using System;
using System.Collections.Generic;
public class Demo {
   public static void Main(String[] args){
      string[] strArr = { "John", "Tom", "Kevin", "Mark", "Gary" };
      List<string> list = new List<string>(strArr);
      Console.WriteLine("Elements in a List...");
      foreach(string str in list){
         Console.WriteLine(str);
      }
      strArr = new string[] { "Demo", "Text" };
      Console.WriteLine("Inserted new elements in a range...");
      list.InsertRange(3, strArr);
      foreach(string res in list){
         Console.WriteLine(res);
      }
   }
}

Output

This will produce the following output −

Elements in a List...
John
Tom
Kevin
Mark
Gary
Inserted new elements in a range... John
Tom
Kevin
Demo
Text
Mark
Gary

Example

Let us now see another example −

 Live Demo

using System;
using System.Collections.Generic;
public class Demo {
   public static void Main(String[] args){
      int[] intArr = { 10, 20, 30, 40, 50 };
      List<int> list = new List<int>(intArr);
      Console.WriteLine("Elements in a List...");
      foreach(int i in list){
         Console.WriteLine(i);
      }
      intArr = new int[] { 300, 400, 500};
      Console.WriteLine("Inserted new elements in a range...");
      list.InsertRange(2, intArr);
      foreach(int res in list){
         Console.WriteLine(res);
      }
   }
}

Output

This will produce the following output −

Elements in a List...
10
20
30
40
50
Inserted new elements in a range...
10
20
300
400
500
30
40
50

AmitDiwan

Published on 10-Dec-2019 12:26:30