Objective: Build a C$\backslash$# program that manages a list of products in an inventory. The program should allow users to add, search, and display products, as well as save$/$load inventory data to and from a file.

Project Requirements

$1.$ Product Class: Create a class with the following properties:

$-$ Product ID $($string$)$: A unique identifier for the product.

$-$ Name $($string$)$: The product name.

$-$ Price $($decimal$)$: The product price.

$-$ Quantity in Stock $($int$)$: The number of items in stock.

$2.$ Main Program Functionalities:

$-$ Add Product: Allow the user to add a new product to the inventory. Check for duplicate product IDs and handle them gracefully with an exception.

$-$ Search Product: Let the user search for a product by ID or name. If the product is not found, handle it with an exception and display a user$-$friendly message.

$-$ Update Stock: Provide an option to update the stock of a specific product.

$-$ Display Inventory: Display a list of all products in the inventory with their details $($ID$,$ name, price, quantity$).$

$3.$ File Handling:

$-$ Save Inventory: Save the current inventory to a file $($e$.$g$.,$ inventory.txt$).$ Each line in the file should contain a product's details in a structured format $($e$.$g$.,$ CSV$).$

$-$ Load Inventory: Load inventory data from a file. Handle exceptions if the file is not found or if there's a formatting error in the data.