C# TREEVIEW控件的右击事件

private   void  treeView_MouseUp( object  sender, System.Windows.Forms.MouseEventArgs e)
{
     Point p1 = new  Point(e.X,e.Y);
     TreeNode nod1 = this .treeView.GetNodeAt(p1);
     if  (nod1 != null && e.Button == MouseButtons.Right)
     {
         this .treeView.SelectedNode = nod1;
         MessageBox.Show( this .treeView.SelectedNode.Text);
     }
}