How do i convert Strings to Integers?

Question

So, just got into programming.
Hopefully this can help me to explain:
       
        String age = "";
 
        Console.WriteLine("Enter age:");
        age = Console.ReadLine();

Now i want to take that age, and convert it to an integer so as i can manipulate it to work out the users age in Months, weeks, days, hours, minutes and seconds.

As i recall, you can do this with a Console.<something> command, and i remember the command having a '32' in it somewhere, any help would be appreciated.

New to this site also, hoping it will help me through college, as the course consists of using C#. :)

-Stuart