How fetch webpage data into file?

Question

I have been trying to get a complete example on the following Open a website using the WebBrowser control in C#.net 2010.
Enter the UserID and password,
Click on the Login button
Then, on the next page, enter all the form fields and submit
On a different page, read the results and store it in a file or anything. Main requirement is to fetch that data and store it.

Can you please help me with the source code ?
How can i carried out this task ?
Thank you.