How to call the method in the Page load?

Question

Here this is my program

 

 

using System.Data;

using System.Drawing;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace SecondWeekContinues

{

public partial class TreeViewDemo : Form

{

public TreeViewDemo()

{

InitializeComponent();

ListDirectory(,"D:\\");    //See i am getting error here

}

private void ListDirectory(TreeView treeView, string path)

{

treeView1.Nodes.Clear();

var stack = new Stack<TreeNode>();

var rootDirectory = new DirectoryInfo(path);

var node = new TreeNode(rootDirectory.Name) { Tag = rootDirectory };

stack.Push(node);

while (stack.Count > 0)

{

var currentNode = stack.Pop();

var directoryInfo = (DirectoryInfo)currentNode.Tag;

foreach (var directory in directoryInfo.GetDirectories())

{

var childDirectoryNode = new TreeNode(directory.Name) { Tag = directory };

currentNode.Nodes.Add(childDirectoryNode);

stack.Push(childDirectoryNode);

}

foreach (var file in directoryInfo.GetFiles())

currentNode.Nodes.Add(new TreeNode(file.Name));

}

treeView1.Nodes.Add(node);

}

}

}