How to Join Lists in C# - Step by Step Examples

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How to Join Lists in C# ?

Answer

To join lists in C#, you can use the `AddRange` method to combine multiple lists into a single list.

✐ Examples

1 Join Two Lists of Integers

In this example,

We create two lists named list1 and list2 with integer values.
We create a new list named joinedList and use the AddRange method to add all elements from list1 and list2 to joinedList.
Finally, we print the joined list to verify the result.

C# Program

using System;
using System.Collections.Generic;

class Program {
    static void Main() {
        List<int> list1 = new List<int> { 1, 2, 3 };
        List<int> list2 = new List<int> { 4, 5, 6 };
        List<int> joinedList = new List<int>();
        joinedList.AddRange(list1);
        joinedList.AddRange(list2);
        Console.Write("Joined List: ");
        foreach (int n in joinedList) {
            Console.Write(n + " ");
        }
    }
}

Output

Joined List: 1 2 3 4 5 6

2 Join Multiple Lists of Strings

In this example,

We create three lists named listA, listB, and listC with string values.
We create a new list named resultList and use the AddRange method to add all elements from listA, listB, and listC to resultList.
Finally, we print the joined list to verify the result.

C# Program

using System;
using System.Collections.Generic;

class Program {
    static void Main() {
        List<string> listA = new List<string> { "apple", "banana" };
        List<string> listB = new List<string> { "cherry", "date" };
        List<string> listC = new List<string> { "fig", "grape" };
        List<string> resultList = new List<string>();
        resultList.AddRange(listA);
        resultList.AddRange(listB);
        resultList.AddRange(listC);
        Console.Write("Joined List: ");
        foreach (string s in resultList) {
            Console.Write(s + " ");
        }
    }
}

Output

Joined List: apple banana cherry date fig grape

Summary

In this tutorial, we learned How to Join Lists in C# language with well detailed examples.

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How to Join Lists in C# - Step by Step Examples

How to Join Lists in C# ?

Answer

✐ Examples

1 Join Two Lists of Integers

C# Program

Output

2 Join Multiple Lists of Strings

C# Program

Output

Summary

More C# Lists Tutorials