FileExplorer.MainForm.treeView1_AfterSelect C# (CSharp) Method

        private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
        {
            if (!_initializationComplete)
                return;

            TreeNode node = e.Node;
            listBox1.Items.Clear();
            ThreadPool.QueueUserWorkItem(_ =>
            {
                foreach (string file in Directory.GetFiles(node.Name))
                {
                    listBox1.Items.Add(Path.GetFileName(file));
                }
            });
            node = null;
        }