Etwas

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace ISXNodeGather
{
    public partial class Form1 : Form
    {
        enum eState { running, paused };
        eState _State = eState.paused;
        List<Node> _NodeList = new List<Node>();

        public double WalkNodes(List<Node> nodes, Node curPos, double totalDistance)
        {
            if (nodes.Count == 1)
            {
                return curPos.Distance(nodes[0]) + totalDistance;
            }

            foreach (Node node in nodes)
            {
                WalkNodes(nodes.Remove(node), node, totalDistance + curPos.Distance(node));
            }

            return 0;
        }

        public List<int> BruteForcePath(List<Node> nodes, Node startPos)
        {
            List<int> order = new List<int>();

            WalkNodes(nodes, startPos, 0);

            return order;
        }

        public Form1()
        {
            InitializeComponent();
            UpdateUI();
        }

        private void buttonStart_Click(object sender, EventArgs e)
        {
            if (_State == eState.running)
            {
                _State = eState.paused;
            }
            else
            {
                _State = eState.running;
            }
            UpdateUI();
        }

        private void UpdateUI()
        {
            if (_State == eState.paused)
                buttonStart.Text = "Start";
            else
                buttonStart.Text = "Pause";
        }
    }
}