C#을 사용하여 너비 우선 검색 알고리즘을 작성하는 방법

using System;
using System.Collections.Generic;

public class BFS
{
    public class Node
    {
        public int value;
        public List<Node> neighbors;

        public Node(int v)
        {
            value = v;
            neighbors = new List<Node>();
        }
    }

    public static void BFSAlgorithm(Node start)
    {
        Queue<Node> queue = new Queue<Node>();
        HashSet<Node> visited = new HashSet<Node>();

        queue.Enqueue(start);
        visited.Add(start);

        while (queue.Count > 0)
        {
            Node node = queue.Dequeue();
            Console.Write(node.value + " ");

            foreach (Node neighbor in node.neighbors)
            {
                if (!visited.Contains(neighbor))
                {
                    queue.Enqueue(neighbor);
                    visited.Add(neighbor);
                }
            }
        }
    }

    public static void Main(string[] args)
    {
        Node node1 = new Node(1);

        Node node2 = new Node(2);
        Node node3 = new Node(3);
        node1.neighbors.Add(node2);
        node1.neighbors.Add(node3);

        Node node4 = new Node(4);
        Node node5 = new Node(5);
        Node node6 = new Node(6);
        node2.neighbors.Add(node4);
        node2.neighbors.Add(node5);
        node3.neighbors.Add(node6);

        BFSAlgorithm(node1);
    }
}