https://learn.microsoft.com/tr-tr/dotnet/api/system.windows.automation.elementnotavailableexception?view=netframework-4.8.1
ElementNotAvailableException Class (System.Windows.Automation) | Microsoft Learn
Contains information about the exception that is raised when an attempt is made to access an UI Automation element corresponding to a part of the user...
class systemwindowsautomationmicrosoftlearn