public static Customer HaveYouBeenHereBefore()
{
var currentCustomer = new UserSystem();
Console.Write("Welcome! Have you been here before? (y/n):");
string mainUserInput = Console.ReadLine();
try
{
switch (mainUserInput)
{
case "y":
return(currentCustomer.OldCustomer());
case "n":
return(currentCustomer.AddCustomer());
default:
Console.WriteLine("Not a valid option. Try again");
return(HaveYouBeenHereBefore());
}
}
catch (FormatException)
{
Console.WriteLine("You have to enter (y/n) Try again");
return(HaveYouBeenHereBefore());
}
}