C# Console Application: Number Guessing Game Demo

Here's a C# console application demonstrating loops and conditional statements through a number guessing game:

using System;

class Program {
    static void Main(string[] args) {
        Console.WriteLine('Welcome to the number guessing game!');

        Random rand = new Random();
        int secretNumber = rand.Next(1, 101);

        int tries = 0;
        while (tries < 5) {
            Console.Write('Guess a number between 1 and 100: ');
            string input = Console.ReadLine();
            int guess;
            if (!int.TryParse(input, out guess)) {
                Console.WriteLine('Invalid input, please enter a number.');
                continue;
            }

            if (guess == secretNumber) {
                Console.WriteLine('Congratulations, you guessed the secret number!');
                return;
            }
            else if (guess < secretNumber) {
                Console.WriteLine('Too low, try again.');
            }
            else {
                Console.WriteLine('Too high, try again.');
            }

            tries++;
        }

        Console.WriteLine('Sorry, you ran out of tries. The secret number was {0}.', secretNumber);
    }
}

This program generates a random number between 1 and 100 and prompts the user to guess. The user has 5 tries. Invalid input prompts the user to enter a valid number. Correct guess ends the game with a congratulatory message. Running out of tries reveals the secret number and ends the game.