Inventory Class

Create an application that stores inventory records for a retail store. The application should have an Inventory class with the following properties:

invNumber: A string used to hold an inventory number. Each item in the inventory should have a unique inventory number.

Description: A string that holds a brief description of the item.

Cost; a Decimal Value that holds the amount that the retail store paid for the item.

Retail: A decimal value that holds the retail price for the item.

Onhand: An integer value that holds the number of items on hand. It canot be less than 0.

The application should store Inventory class objects in a List collection.

Create an input form in the application that allows users to input new inventory items to be added to the List collection. The user should also be able to look up items by their inventory number. Inventory When the application ends, it should save the contents of the List collection to a sequential text file. When the application starts up, it should load the data from the file into the collection. Be sure to write the appropriate error handlers.

Need this written in C#