Create a List of Lists in C#

This post will discuss how to create a List of Lists in C#.

A simple solution for constucting a List of Lists is to create the individual lists and use the List<T>.Add(T) method to add them to the main list. The following example demonstrates its usage.

using System;

using System.Collections.Generic;

public class Example

{

public static void Main()

{

List<string> lang1 = new List<string>() { "C", "C++" };

List<string> lang2 = new List<string>() { "Java", "C#" };

List<List<string>> listOfLists = new List<List<string>>();

listOfLists.Add(lang1);

listOfLists.Add(lang2);

foreach (var list in listOfLists) {

Console.WriteLine(String.Join(", ", list));

}

Download Run Code

Output:

C, C++
Java, C#

This is equivalent to: