gistfile1.cs

using System;

namespace GuessTheNumber
{
	class Program
	{
		static Random rng = new Random();
		static int min=0;
		static int max=100;
		static int guess = 0;
		static int tries = 0;

		private static void Main()
		{
			var number = rng.Next(1, 100);

			Console.WriteLine("Do you want to [g]uess or [c]hoose?");
			string choice = Console.ReadLine();
			if (choice.StartsWith("c"))
			{
				Console.WriteLine("Insert your number between 1 and 100:");
				int.TryParse(Console.ReadLine(), out number);
				GuessAI(number);
			}
			else
				GuessUser(number);
		}

		private static void GuessUser(int number)
		{
			Console.WriteLine("I generated a number between 1 and 100. Can you guess it?");
			while (guess != number)
			{
				int.TryParse(Console.ReadLine(), out guess);

				if (guess != number)
					Console.WriteLine("No, it's {0} than {1}. Try again.", guess < number ? "higher" : "lower", guess);
				tries++;
			}
			Console.WriteLine("Great, the answer was {0}. It took you {2} tries.", number, tries);
			Console.ReadLine();
		}


		private static void GuessAI(int number)
		{
			Console.WriteLine("You generated a number between 1 and 100. Let me try");
			while (guess != number)
			{
				Console.WriteLine("Is it {0}?", Pick(number, ref guess));
				if (guess != number)
					Console.WriteLine("No, it's {0} than {1}. Let my try again.", guess < number ? "higher" : "lower", guess);
				tries++;
			}
			Console.WriteLine("Great, the answer was {0}. It took me {1} tries.", number, tries);
			Console.ReadLine();
		}

		private static int Pick(int number, ref int guess)
		{
			if (guess > number)
				max = guess;
			else
				min = guess;

			return guess = rng.Next(min, max);
		}
	}
}