.NET HelloWorld

Program.cs

using System;

namespace HelloWorld
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Your name?");
            string name = Console.ReadLine();
            Console.WriteLine("Your age?");
            int age;
            if (int.TryParse(Console.ReadLine(), out age))
                Console.WriteLine("Hello " + name  + ", and happy " + age + " years!");
            else {
                Console.WriteLine("Hello " + name + "! please check your input for age");
                Environment.Exit(0);
            }
        }
    }
}