Handle Alert in Selenium

    public void HandleAlert()

        {

            try

            {

                WebDriverWait _wait1 = new WebDriverWait(webDriver, TimeSpan.FromSeconds(60));

                IAlert alertDialog = _wait1.Until<IAlert>(ExpectedConditions.AlertIsPresent());

                if (alertDialog != null)

                    alertDialog.Dismiss();

                webDriver.SwitchTo().DefaultContent();

            }

            catch (UnhandledAlertException)

            {

                try { webDriver.SwitchTo().Alert().Dismiss(); } catch (NoAlertPresentException) { }

                webDriver.SwitchTo().DefaultContent();

            }

            catch

            {

                webDriver.SwitchTo().DefaultContent();

            }

            webDriver.SwitchTo().Frame(StandardConfigFrame);

        }