- StockMarket.cs - class representing stock market containing stocks
- CommonStock.cs - class representing a common stock
- PreferredStock.cs - class representing a preferred stock (subclass of CommonStock)
- Trade.cs - class representing a trade
- Helpers.cs - contains two helper methods for checking whether values are positive or strictly greater than zero. Used in checking values used in calculations.
- StockMarketTests.cs - contains some tests for methods contained in classes in the SimpleStockMarketProject.