In the "SurveyBuilder Corner" section of each tutorial, you will see how to apply the skills you have learned in the real world by gradually building an application called SurveyBuilder. You can see the full version on .NET Fiddle (You can use your .NET Academy account to log in).

SurveryBuilder does the following

It determines how much a person likes programming by asking them:

1. Do you like programming?
2. Which programming languages do you know?
3. How many open source projects are you involved with?

It then calculates a score based on the answers.

It isn't likely to compete with IBM's Watson, but it will introduce you to the concepts of C#.