How to create a Two Dimensional List in C# - Step by Step Examples

How to create a Two Dimensional List in C# ?

Answer

To create a Two-Dimensional List in C#, you can use nested lists or lists of lists to represent rows and columns.


✐ Examples

1 Create a 2D List of Integers

In this example,

  1. We include the necessary using directives and define the Main method.
  2. We declare a 2D list using List> with integers as the data type.
  3. We initialize the elements of the 2D list with integer values.
  4. We print the 2D list to the console.

C# Program

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        List<List<int>> matrix = new List<List<int>>()
        {
            new List<int> {1, 2, 3},
            new List<int> {4, 5, 6},
            new List<int> {7, 8, 9}
        };

        foreach (var row in matrix)
        {
            foreach (var element in row)
            {
                Console.Write(element + " ");
            }
            Console.WriteLine();
        }
    }
}

Output

1 2 3 
4 5 6 
7 8 9

2 Create a 2D List of Strings

In this example,

  1. We include the necessary using directives and define the Main method.
  2. We declare a 2D list using List> with strings as the data type.
  3. We initialize the elements of the 2D list with string values.
  4. We print the 2D list to the console.

C# Program

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        List<List<string>> matrix = new List<List<string>>()
        {
            new List<string> {"apple", "banana", "cherry"},
            new List<string> {"orange", "grape", "kiwi"}
        };

        foreach (var row in matrix)
        {
            foreach (var element in row)
            {
                Console.Write(element + " ");
            }
            Console.WriteLine();
        }
    }
}

Output

apple banana cherry 
orange grape kiwi

Summary

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


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