Question: 5. In this exercise, you modify the application from Exercise 2. Use Windows to make a copy of the Jacoby Solution folder. Rename the copy

5. In this exercise, you modify the application from Exercise 2. Use Windows to make a copy of the Jacoby Solution folder. Rename the copy Jacoby Solution-LINQ. Open the Jacoby Solution (Jacoby Solution.sln) file contained in the Jacoby Solution-LINQ folder.

Add a button named btnTotal to the form. Change the button’s Text property to &Total Sales. The button’s Click event procedure should display the total sales amount in a message box. (Hint: Use one of the LINQ aggregate operators, which you learned about in Chapter 13.) Test the application appropriately.

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