private void TreeViewMouseHover(object sender, EventArgs e)
        {
            TreeNode nodo = EstatesTree.GetNodeAt(
                EstatesTree.PointToClient(Cursor.Position)
                );

            if (nodo != null)
            {
                nodo.ToolTipText = (nodo as AreaTreeNode).Area.Remarks;
            }
        }
 private void ColapseAllToolStripMenuItem_Click(object sender, EventArgs e)
 {
     EstatesTree.CollapseAll();
 }
 private void ExpandAllToolStripMenuItem_Click(object sender, EventArgs e)
 {
     EstatesTree.ExpandAll();
 }