how do i transfer variables from the function to the thread?

for some reason this code throws me an error

private void button1_Click(object sender, EventArgs e)
{
    treeView1.BeginUpdate();
    TreeNode labelnode = treeView1.Nodes[0].Nodes.Add("Label" + labelnum.ToString());
    treeView1.EndUpdate();

    //create id
    string id = "1";

    Thread thread = new Thread(new ThreadStart(Worker(labelnode, id))); // it errors out here
    thread.Start();
}

private void Worker(TreeNode labelnode, string id)
{ 
    while (true)
    {
        Thread.Sleep(50);
        if (labelnode.IsSelected == true)
        {
            showProperties("label", id);
        }
    }
}

what i was trying to do here is show properties when labelnode was selected. would be glad and thankful if someone helped me

>Solution :

It seems that what the code is trying to do is check whether a node is selected. The proper way to do this is to use the TreeView.AfterSelect event. Using a thread like this will peg a CPU core at 100% doing nothing.

private void TreeView1_AfterSelect(System.Object sender, 
    System.Windows.Forms.TreeViewEventArgs e)
{
    if (e.Node==treeView1.Nodes[0]) //Or whatever condition you want
    {
        showProperties("label", e.Node.Tag);
    }
}

In Windows Forms almost all controls have a Tag property that can be used to store anything the application wants. You can store the ID value in the new node’s tag :

TreeNode labelnode = treeView1.Nodes[0].Nodes.Add("Label" + labelnum.ToString());
labelNode.Tag="1";