using System;

public class Program

{

    public enum Hand {Rock=1, Paper, Scissors};

    static int playerScore=0;

    static  int computerScore=0;

    public static void Main()

    {

        Hand playerHand;

        Hand computerHand;

        int checkHand;

        int gameLoop=1;

        Console.WriteLine("Let play Rock-Paper-Scissors game");

        // игровой цикл

        do 

        {

          Console.WriteLine("Make your choice");

          Console.WriteLine("input 1 for Rock, 2 for Paper, 3 for Scissors");

          checkHand = CheckInput(1,3);  

          playerHand = (Hand)(Convert.ToInt32(checkHand));

          Console.WriteLine("Good. Your hand is {0}...", playerHand);

          Console.WriteLine("and");

         computerHand = GetComputerHand();

          Console.WriteLine("Computer hand is {0}", computerHand);

          GetResult(playerHand,computerHand);

          Console.WriteLine("The total score is {0}:{1}",playerScore, computerScore);

          Console.WriteLine("Whis to play again? Input 1 for YES, 0 for NO");   

          gameLoop=CheckInput(0,1); 

        }

        while(gameLoop!=0);

    }

        // метод проверки числового ввода

        private static int CheckInput(int s, int f)

    {

        bool result=false; 

        int input=0; 

        do

         {

        result = Int32.TryParse(Console.ReadLine(), out input);

         if (!result | input>f | input<s )

           {

              Console.WriteLine("Invalid input. Try Again");         

           }

         }

        while (!result | input>f | input<s );

    return input;

    }   

    // метод определяющий и выводящий результат

    public static void GetResult(Hand p, Hand c)

    {

        if (p==c)

        {

            Console.WriteLine("A TIE this time");

        }

        else if (p==Hand.Paper && c==Hand.Rock)

        {

            Console.WriteLine("Lucky you! You WIN !");

            playerScore+=1;

        }

        else if (p==Hand.Rock && c==Hand.Scissors)

        {

            Console.WriteLine("Lucky you! You WIN !");

            playerScore+=1;

        }

        else if (p==Hand.Scissors && c==Hand.Paper)

        {

            Console.WriteLine("Lucky you! You WIN !");

            playerScore+=1;

        }

        else 

        {

            Console.WriteLine("What a pitty. You LOSE");

            computerScore+=1;

        }

    }

        public static Hand GetComputerHand()

        {

         var rand = new Random();

         Hand computerHand; 

            computerHand = (Hand)rand.Next(1,4);

            return computerHand;

        }

    }

​