How to Copy a List in C# - Step by Step Examples

How to Copy a List in C# ?

Answer

In C# using List, you can copy a list by creating a new list and adding all elements from the original list to the new list.


✐ Examples

1 Copy List by Initializing a New List

In this example,

  1. We create an original list named originalList using List with some elements.
  2. We create a new list named copiedList and initialize it with the elements of originalList using the AddRange method.
  3. After the operation, copiedList contains all elements of originalList.
  4. Finally, we print both lists to demonstrate the copy operation.

C# Program

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        List<int> originalList = new List<int> { 1, 2, 3, 4 };
        List<int> copiedList = new List<int>(originalList);

        foreach (var item in originalList)
        {
            Console.Write(item + " ");
        }
        Console.WriteLine();

        foreach (var item in copiedList)
        {
            Console.Write(item + " ");
        }
        Console.WriteLine();
    }
}

Output

1 2 3 4
1 2 3 4

2 Copy List Using AddRange Method

In this example,

  1. We create an original list named originalList using List with some elements.
  2. We create a new list named copiedList.
  3. We use the AddRange method of copiedList and pass the originalList to copy its elements.
  4. After the operation, copiedList contains all elements of originalList.
  5. Finally, we print both lists to demonstrate the copy operation.

C# Program

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        List<int> originalList = new List<int> { 1, 2, 3, 4 };
        List<int> copiedList = new List<int>();
        copiedList.AddRange(originalList);

        foreach (var item in originalList)
        {
            Console.Write(item + " ");
        }
        Console.WriteLine();

        foreach (var item in copiedList)
        {
            Console.Write(item + " ");
        }
        Console.WriteLine();
    }
}

Output

1 2 3 4
1 2 3 4

Summary

In this tutorial, we learned How to Copy a List in C# language with well detailed examples.


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