Write a C# Console program that processes a number of purchases for a user. You can use a counter controlled loop (asking the user how many items they have to purchase) or a sentinel controlled loop. It is up to you. The program should ask for the quantity, price, and discount for each item inside the loop. 

The program should find and display a subtotal for the order

(sum of the quantity * price - discount for each item added together) as well as the tax (7% of subtotal), and the final total. These summary values should be printed at the end of the program for the user.