Check all children in a TreeView

CheckChildren.cs

// Updates all child tree nodes recursively. 

private void CheckAllChildNodes(TreeNode treeNode, bool nodeChecked)
{
    foreach (TreeNode node in treeNode.Nodes)
    {
        node.Checked = nodeChecked;
        if (node.Nodes.Count > 0)
        {
            // If the current node has child nodes, call the CheckAllChildsNodes method recursively. 
            CheckAllChildNodes(node, nodeChecked);
        }
    }
}


private void myTreeView1_AfterCheck(object sender, TreeViewEventArgs e)
{
    // The code only executes if the user caused the checked state to change. 
    if (e.Action == TreeViewAction.Unknown) return;
    if (e.Node.Nodes.Count > 0)
    {
        /* Calls the CheckAllChildNodes method, passing in the current 
            Checked value of the TreeNode whose checked state changed. */
        CheckAllChildNodes(e.Node, e.Node.Checked);
    }
}