Write a program in Visual Studio C# windows form

How it works

The user selects a book from the combo box, and the application displays the unit price, sales units, and sales dollars for that book. It also calculates and displays the average price for the book.

What do you need to have

This application uses separate arrays (up to 4 arrays) that are used to store the books info, unit price, sales units, and sales dollars for each book as follows:

Book ID	Index	Unit price	Unit sales	Dollar sales
CICS	0	54.00	1,306	42,779
COBOL	1	62.50	866	32,745
Java 2	2	49.50	2,517	74,741
JCL	3	62.50	1,450	52,913
VB.NET	4	49.50	462	18,320

When this application starts, it loads the sorted list with the book IDs and indexes, and it loads the combo box with the book IDs.

When the user selects a book from the combo box, this application uses the value of the selected item to get the value of the associated item in the sorted list. Then, it uses that value to retrieve and display the information for the selected book.