public string Validate()
{
var appIdDigits = appId.GetDigitsQuantity();
if (ProfileId.GetDigitsQuantity() != 17)
{
return("Profile Id must to contain of 17 digits");
}
else if (frequency < 5)
{
return("Frequency must to be positive and more than 5 seconds");
}
else if (appIdDigits < 3 || appIdDigits > 6)
{
return("App Id must to be between 3 and 6 digits");
}
return(string.Empty);
}