public string Save()
{
// csv format that will be saved
return(Name + "," + Salary.ToString("N") + "," + InvestmentIncome.ToString("N") + ","
+ TaxableIncome.ToString("N") + "," + FormatTaxRate() + "," + ComputeTax().ToString("N"));
}
// output methods
public string Info()
{
// this is what USED to be displayed by the submit button
return("Name: " + Name + ", Salary: " + Salary.ToString("C") + ", Investment Income: " + InvestmentIncome.ToString("C")
+ ", Exemptions: " + Exemptions.ToString() + ", Marital Status: " + FormatMarriedString() + Environment.NewLine);
}