unity exit script
//C#
public static class AppHelper
{
#if UNITY_WEBPLAYER
public static string webplayerQuitURL = "http://google.com";
#endif
public static void Quit()
{
#if UNITY_EDITOR
UnityEditor.EditorApplication.isPlaying = false;
#elif UNITY_WEBPLAYER
Application.OpenURL(webplayerQuitURL);
#else
Application.Quit();
#endif
}
}