static void Main(String[] args)
{
// With dependency injection.
//var operationHandler = DependencyServiceProvider.Get().GetService<IOperationHandler>();
var operationHandler = new OperationHandler(new BuySellOperationHandler());
while (true)
{
var argument = Console.ReadLine();
if (string.IsNullOrEmpty(argument))
{
break;
}
if (argument.ToUpper() == OperationType.Print)
{
operationHandler.Print();
}
else
{
var operation = OperationsFactory.Get(argument);
operationHandler.Process(operation);
}
}
}