c# popup close selenium

String parent = driver.getWindowHandle();

        Set<String> pops=driver.getWindowHandles();
        {
        Iterator<String> it =pops.iterator();
        while (it.hasNext()) {

            String popupHandle=it.next().toString();
            if(!popupHandle.contains(parent))
            {
            driver.switchTo().window(popupHandle);
            System.out.println("Popu Up Title: "+ driver.switchTo().window(popupHandle).getTitle());
            driver.close();

public class WindowExamples {
	static WebDriver driver;

	@Test
	public void test_CloseAllWindowsExceptMainWindow() {
		driver = new FirefoxDriver();
		// It will open Naukri website with multiple windows
		driver.get("http://www.naukri.com/");
		
		// To get the main window handle
		String windowTitle= getCurrentWindowTitle();
		String mainWindow = getMainWindowHandle(driver);
		Assert.assertTrue(closeAllOtherWindows(mainWindow));
		Assert.assertTrue(windowTitle.contains("Jobs - Recruitment"), "Main window title is not matching");
	}
		
	public String getMainWindowHandle(WebDriver driver) {
		return driver.getWindowHandle();
	}

	public String getCurrentWindowTitle() {
		String windowTitle = driver.getTitle();
		return windowTitle;
	}
	
	//To close all the other windows except the main window.
	public static boolean closeAllOtherWindows(String openWindowHandle) {
		Set<String> allWindowHandles = driver.getWindowHandles();
		for (String currentWindowHandle : allWindowHandles) {
			if (!currentWindowHandle.equals(openWindowHandle)) {
				driver.switchTo().window(currentWindowHandle);
				driver.close();
			}
		}
		
		driver.switchTo().window(openWindowHandle);
		if (driver.getWindowHandles().size() == 1)
			return true;
		else
			return false;
	}
}