How to wait for the site to load before executing the code?

Question

C++ / C#

Tipo the site will not have time to load, and the line with getting html is already running and as a result an error appears, how to fix it?

browser.ViewSource();
html = browser.GetSourceAsync().Result;  // Если страница не успеет загрузиться, то html будет пустым.

Answer 1

https://metanit.com/sharp/tutorial/13.3.php