Index (zero based) must be greater than or equal to zero

Question

Hey I keep getting an error:

Index (zero based) must be greater than or equal to zero and less than the size of the argument list.

Answer 1

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main()
        {
            Console.WriteLine("Enter Your FirstName ");
            String FirstName = Console.ReadLine();

            Console.WriteLine("Enter Your LastName ");
            String LastName = Console.ReadLine();
            Console.ReadLine();

            Console.WriteLine("Hello {0}, {1} ", FirstName, LastName);
            Console.ReadLine();

        }
    }
}