internal string ValidCustomerFirstName()//Validate the User FirstName
{
Console.WriteLine("FirstName : ");
CustomerFirstName = Console.ReadLine();
if (CustomerFirstName.Length < 2 && CustomerFirstName.Length > 20)//Checks for the customer name length
{
Console.WriteLine("The name is not valid try again..");
CustomerFirstName = ValidCustomerFirstName();
}
Regex check = new Regex(@"([A-Z][a-z-A-Z])");
bool valid = check.IsMatch(CustomerFirstName);
Regex check1 = new Regex(@"([0-9])");
if (check1.IsMatch(CustomerFirstName) == true)
{
valid = false;
}
char[] charName = CustomerFirstName.ToCharArray();
for (int i = 0; i < charName.Length - 2; i++)
{
if ((charName[i] == charName[i + 1]) && (charName[i + 1] == charName[i + 2]))
{
valid = false;
break;
}
}
if ((valid == false))
{
Console.WriteLine("Name is Invalid..");
CustomerFirstName = ValidCustomerFirstName();
}
return(CustomerFirstName);
}
