Disable Child Controls Recursively

public void ControlStatus(Control control, bool isDisable)
{
    foreach (Control c in control.Controls)
        if (c.HasControls())
            ControlStatus(c, isDisable);
        else
        {
            WebControl wc = c as WebControl;

            if (wc != null)
                wc.Enabled = !isDisable;
        }
}

Ignoring exceptions is bad programming practice. Use 'as' to avoid casting c twice.