Resize the window in order to activate the screen boundary detection. Expand the first and the second root nodes then scroll to the bottom and expand the last root node. Notice that the drop down is scrolled to the top.



  <telerik:RadDropDownTree runat="server"ID="RadDropDownTree1" >
    </telerik:RadDropDownTree>

    protected void Page_Load(object sender, EventArgs e)
    {
        var tree = RadDropDownTree1.EmbeddedTree;

        for (int i = 0; i < 10; i++)
        {

            tree.Nodes.Add(new RadTreeNode("Roo t" + i.ToString()));
            for (int j = 0; j < 10; j++)
            {
                tree.Nodes[i].Nodes.Add(new RadTreeNode("Sub" + i.ToString() + " " + j.ToString()));
            }

        }
    }