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);
     }
}