public string SaveInvoiceDetails(string fname, string mname, string lname, string phone, string email, string amount)
{
string ret = "";
PhoneValidator ph = new PhoneValidator();
if (!bll.IsValidEmailAddressOptional(email))
{
ret = "Please Provide a valid email address";
}
else if (!ph.PhoneNumbersOk(phone) && !phone.Equals(""))
{
ret = phone + " is not a valid phone number";
}
else
{
}
return(ret);
}