C# Online Compiler | .NET Fiddle

using System;
using System.Linq;
					
public class Program
{
	public static void Main()
	{
		Console.WriteLine(
            Enum.GetValues<PaymentMethods>()
                .Select((e, i) => $"{i + 1}. {e.ToString()}")
                .Aggregate((x, y) => x + Environment.NewLine + y));

        var key = Console.ReadLine()!;

        var hasPaymentMethod = Enum.TryParse<PaymentMethods>(key, out var paymentMethod);

        if (!hasPaymentMethod) return;

        var cart = new Cart
        {
            TotalPrice = 1453M
        };

        switch (paymentMethod)
        {
            case PaymentMethods.CreditCard:
            {
                Console.Write("Card Number : ");
                var cardNumber = Console.ReadLine();

                if (string.IsNullOrEmpty(cardNumber)) return;

                Console.Write("Full Name : ");
                var fullName = Console.ReadLine();

                if (string.IsNullOrEmpty(fullName)) return;

                Console.Write("Expiry Date : ");
                var expiryDate = Console.ReadLine();

                if (string.IsNullOrEmpty(expiryDate)) return;

                Console.Write("Cvc : ");
                var cvc = Console.ReadLine();

                if (string.IsNullOrEmpty(cvc)) return;

                cart.SetPaymentStrategy(new CreditCardStrategy(cardNumber, fullName, expiryDate, cvc));
                break;
            }
            case PaymentMethods.Wallet:
                cart.SetPaymentStrategy(new WalletStrategy());
                break;
            default:
                throw new ArgumentOutOfRangeException();
        }

        cart.Pay();
	}
}

public interface IPaymentStrategy
{
    void Pay(decimal amount);
}

public class CreditCardStrategy : IPaymentStrategy
{
    private string CardNumber { get; set; }
    private string FullName { get; set; }
    private string ExpiryDate { get; set; }
    private string Cvc { get; set; }

    public CreditCardStrategy(string cardNumber, string fullName, string expiryDate, string cvc)
    {
        CardNumber = cardNumber;
        FullName = fullName;
        ExpiryDate = expiryDate;
        Cvc = cvc;
    }

    public void Pay(decimal amount)
    {
        Console.WriteLine("Paying with credit card");
    }
}

public class WalletStrategy : IPaymentStrategy
{
    public void Pay(decimal amount)
    {
        Console.WriteLine("Paying with wallet");
    }
}

public class Cart
{
    public decimal TotalPrice { get; set; }
    private IPaymentStrategy PaymentStrategy { get; set; }

    public void SetPaymentStrategy(IPaymentStrategy paymentStrategy)
    {
        PaymentStrategy = paymentStrategy;
    }

    public void Pay()
    {
        PaymentStrategy.Pay(TotalPrice);
    }
}

public enum PaymentMethods
{
    CreditCard = 1,
    Wallet = 2
}

 
using System;
using System.Linq;
                    
public class Program
{
    public static void Main()
    {
        Console.WriteLine(
            Enum.GetValues<PaymentMethods>()
                .Select((e, i) => $"{i + 1}. {e.ToString()}")
                .Aggregate((x, y) => x + Environment.NewLine + y));
​
        var key = Console.ReadLine()!;
​
        var hasPaymentMethod = Enum.TryParse<PaymentMethods>(key, out var paymentMethod);
​
        if (!hasPaymentMethod) return;
​
        var cart = new Cart
        {
            TotalPrice = 1453M
        };
​
        switch (paymentMethod)