enable or disable tab pages in tab control

hello every one i found a solution for my problem
fist:
add a tab control,and a button on my project and the add this two methods to my project:

public static void EnableTab(TabPage page, bool enable)
{
    EnableControls(page.Controls, enable);
}
private static void EnableControls(Control.ControlCollection ctls, bool enable)
{
    foreach (Control ctl in ctls)
    {
        ctl.Enabled = enable;
        EnableControls(ctl.Controls, enable);
    }
}

and then double click on the button and add this line to disable tab page :

private void button1_Click(object sender, EventArgs e)
        {
            EnableTab(tabControl1.TabPages[tabControl1.SelectedIndex = 0], false);
        }

and for enable it i add an other button and add this line to enable tab page:

private void button1_Click(object sender, EventArgs e)
        {
            EnableTab(tabControl1.TabPages[tabControl1.SelectedIndex = 0], true);
        }

resource:
Barnamenevis.org