Collect and change the html file using WebBrowser component

Question

You can see the  "Translate text or webpage" text, but I really want to know there is a way to get a webpage html file, then open the specified tag to get data (Sorry!). In this case, is there a way to go to the body tag, then go to the second div tag, then go to the div tag which has id="gt-src-p", then go to another div tag id="gt-src-wrap", then copy the text in label tag to a string variable in c# form app(to display it somewhere), and then somehow change the text user put in right in the WebBrowser component.

Is there anyway to do that step-by-step, I mean you can't know how many div tag the html will has, so I want to keep it specific on the code 

Please remember I ask if it can be done using c# windows form

Thanks,