How Do I Add A Treenode At The Last Of Tree View

Yash35 wrote:

m_oTree.Nodes.Find(oNode.ParentKey, true)[0].Nodes.Add(oNode.Key, oNode.DisplayText, ReturnImageListIndex(oNode), ReturnImageListIndex(oNode));
 
i am adding nodes to treeview with above line of code.
it is windows forms. I want it to be last descendant of its parent node i.e root node.
My tree has a single root node

In the WinForm Microsoft TreeView there is no .ParentKey property of a TreeNode, and someNode.Parent.Key would be an error, also.

While it is possible you have sub-classed TreeNode, and added a 'ParentKey field ... I doubt that.

If you have a single root node in your design, then why not keep a pointer to the Nodes Collection of the root node; then, you can be certain that if you use 'Add on that collection, the TreeNode you add will be the last TreeNode in the TreeView

// create a variable in Form scope
private TreeNodeCollection rootNodes;

// in a method in your application code:
// at a place where the root-node has been created,
// for example: in the Form Load EventHandler
private void YourForm_Load(object sender, EventArgs e)
{
    rootNodes = yourTreeView.Nodes;
    
    // whatever else ...
}

// example of using 'rootNodes:
// in some method:
private void someAddTreeNodeMethod(string nodeText)
{
   rootNodes.Add(new TreeNode(nodeText));
   // do the right thing to set its ImageList pointer, etc.
}