Practicing and exploring

Test your knowledge and understanding by answering some questions, get some hands-on practice, and explore with deeper research into the topics covered in this chapter.

Exercise 9.1 - test your knowledge

Answer the following questions:

1. What are the two required parts of LINQ?
2. Which LINQ extension method would you use to return a subset of properties from a type?
3. Which LINQ extension method would you use to filter a sequence?
4. List five LINQ extension methods that perform aggregation.
5. What is the difference between the Select and SelectMany extension methods?

Exercise 9.2 - practice querying with LINQ

Create a console application, named Ch09_Exercise02, that prompts the user for a city and then lists the company names for Northwind customers in that city:

Enter the name of a city: London
There are 6 customers in London:
Around the Horn
B's Beverages
Consolidated Holdings
Eastern Connection
North/South
Seven Seas Imports

Enhance the application by displaying a list of all...