I want to bring the application to the top of all other apps, but i have tried all the below codes, but none of them working as expected.

code snippet

UIWindow window = UIApplication.SharedApplication.Windows[0];
 if (window != null)
 {
    window.MakeKeyAndVisible();
 }

Another code snippet

UIWindow window = UIApplication.SharedApplication.KeyWindow;
 if (window != null)
 {
    window.MakeKeyAndVisible();
 }

Application should brought to the top as expected