How to Insert an Element at Specific Index in a List in C# - Step by Step Examples

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How to Insert an Element at Specific Index in a List in C# ?

Answer

To insert an element at a specific index in a list in C#, you can use the Insert method of the List class.

✐ Examples

1 Insert Element at Specific Index Using Insert

In this example,

We create a list named numbers with initial integer values.
We use the Insert method to insert a new element at the desired index.
The Insert method shifts the existing elements to the right to make space for the new element.
Finally, we print the updated list to standard output.

C# Program

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        List<int> numbers = new List<int> { 1, 2, 3, 4, 5 };
        numbers.Insert(2, 10);
        Console.WriteLine("Updated list: " + string.Join(", ", numbers));
    }
}

Output

Updated list: 1, 2, 10, 3, 4, 5

2 Insert Element at Specific Index Using List Slicing

In this example,

We create a list named numbers with initial integer values.
We use list slicing to split the original list into two parts: before and after the desired index.
We concatenate the two parts along with the new element to create the updated list.
Finally, we print the updated list to standard output.

C# Program

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        List<int> numbers = new List<int> { 1, 2, 3, 4, 5 };
        int index = 2;
        int element = 10;
        numbers.Insert(index, element);
        Console.WriteLine("Updated list: " + string.Join(", ", numbers));
    }
}

Output

Updated list: 1, 2, 10, 3, 4, 5

Summary

In this tutorial, we learned How to Insert an Element at Specific Index in a List in C# language with well detailed examples.

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How to Insert an Element at Specific Index in a List in C# - Step by Step Examples

How to Insert an Element at Specific Index in a List in C# ?

Answer

✐ Examples

1 Insert Element at Specific Index Using Insert

C# Program

Output

2 Insert Element at Specific Index Using List Slicing

C# Program

Output

Summary

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