public void ProcessSelectedOperation(string operation)
{
switch (operation)
{
case "1":
SelectionManager.AddNewIncome();
break;
case "2":
SelectionManager.AddNewOutcome();
break;
case "3":
SelectionManager.ShowEntryById();
break;
case "4":
SelectionManager.RemoveExistingEntryById();
break;
case "5":
SelectionManager.ShowAllEntries();
break;
case "6":
SelectionManager.GenerateMonthlyFinancialReport();
break;
}
}