C#

using System;
using System.Collections.Generic;


  namespace PathFinding
  {
    public class SimplePathFinder
    {
      Map nodeMap;

      Node startNode;
      Node endNode;

      Queue<Node> finalPath = new Queue<Node>();

      bool isPathFound;

      public bool this[int x, int y]
      {
        get { return nodeMap[(ushort)x, (ushort)y]; }
        set
        {
          nodeMap[(ushort)x, (ushort)y] = value;
          isPathFound = false;
        }
      }

      public Coordinate StartNodePositon
      {
        get { return new Coordinate(startNode.X, startNode.Y); }
        set
        {
          startNode.X = (ushort)value.X;
          startNode.Y = (ushort)value.Y;
          isPathFound = false;
        }
      }
      
      public Coordinate EndNodePositon
      {
        get { return new Coordinate(endNode.X, endNode.Y); }
        set
        {
          endNode.X = (ushort)value.X;
          endNode.Y = (ushort)value.Y;
          isPathFound = false;
        }
      }

      public Coordinate[] Path
      {
        get
        {
          if (!isPathFound)
            FindPath();
          
          if (finalPath.Count == 0)
            throw new ApplicationException("Path not found, the start node or the end node is enclosed or do not exist.");

          Stack<Coordinate> coordinateStack = new Stack<Coordinate>();
          foreach (Node pathNode in finalPath)
          {
            coordinateStack.Push(new Coordinate(pathNode.X, pathNode.Y));
          }

          return coordinateStack.ToArray();
        }
      }

      public SimplePathFinder(int width, int height, Coordinate startNodePos, 
                              Coordinate endNodePos, Coordinate[] unwalkableNodes)
      {
        nodeMap = new Map((ushort)width, (ushort)height, unwalkableNodes);
        endNode = new Node(null, null, nodeMap, endNodePos.X, endNodePos.Y);
        startNode = new Node(null, endNode, nodeMap, startNodePos.X, startNodePos.Y);
      }

      void FindPath()
      {
        SortedNodeList Open = new SortedNodeList();
        SortedNodeList Closed = new SortedNodeList();

        if (startNode == null || endNode == null || nodeMap == null)
          throw new ApplicationException("StartNodePosition, EndNodePosition, or the Map is not instantiated.");

        Open.Push(startNode);

        while (Open.Count > 0)
        {
          Node currentNode = Open.Pop();

          if (currentNode.Equals(endNode))
          {
            endNode.ParentNode = currentNode.ParentNode;
            break;
          }

          Node[] successors = currentNode.GetSuccessors();

          foreach (Node successorNode in successors)
          {
            int oFound = Open.IndexOf(successorNode);
            if(oFound > 0)
            {
              if (Open.NodeAt(oFound).CompareTo(currentNode) <= 0)
                continue;
            }

            int cFound = Closed.IndexOf(successorNode);
            if (cFound > 0)
            {
              if (Closed.NodeAt(cFound).CompareTo(currentNode) <= 0)
                continue;
            }

            if (oFound >= 0)
              Open.RemoveAt(oFound);
            if (cFound >= 0)
              Closed.RemoveAt(cFound);

            Open.Push(successorNode);
          }

          Closed.Push(currentNode);
        }

        Node p = endNode;
        while (p != null)
        {
          finalPath.Enqueue(p);
          p = p.ParentNode;
        }
        if (finalPath.Count == 1)
          finalPath.Clear();

        isPathFound = true;
      }
    }
  }

static int Sqrt(int x) { if (x<0) throw new ArgumentOutOfRangeException(); int temp, y=0, b=0x8000, bshft=15, v=x; do { if (v>=(temp=(y<<1)+b<<bshft--)) {="" y+="b;" v-="temp;" }="" while="" ((b="">>=1)>0); return y;

BlackBox Version="1.0"
  MainForm Name="frmMain" Value="WillnessLabs BlackBox"
    Control Name="label1" Value="Test label" 
    Control Name="button1" Value="Test button" 
    Control Name="tabPage1" Value="Test tab1" 
    Control Name="tabPage2" Value="Test tab2" 
  MainForm>
  MainForm Name="frmOptions" Value="My beloved options"
    Control Name="label1" Value="Test label" 
  MainForm>
BlackBox

string name, value;
      nav = doc.CreateNavigator();
      node = nav.Select("/BlackBox/MainForm[@Name='frmMain']");

      while (node.MoveNext())
      {
          name = node.Current.GetAttribute("Name", "");
          value = node.Current.GetAttribute("Value", "");

          FindControl(form, name).Text = value;
      }