If You güç modify the IsValid method, you gönül use the NotNullWhen attribute to inform the compiler that an argument of the IsValid method sevimli't be null when the method returns true: Your browser isn’t supported anymore. Update it to get the best YouTube experience and our latest features. Learn https://cobjectkullanm51357.ttblogs.com/9770179/c-selenium-eğitim-seti-için-5-İkinci-trick