C# 如何揭示选择

写一个非常简单的石头剪刀布游戏。我需要它来显示计算机的选择，这样用户在做出选择之前就知道了。我还需要关闭循环中的区分大小写功能。有人能帮我吗

namespace m4
{
    class Program
    {
        static void Main(string[] args)
        {
            do
            {
            Random r = new Random();
            int Player1Choice = r.Next(4);

            Console.WriteLine("Player 1 chose ");
            string Player1Choice = Console.ReadLine();

            Console.WriteLine("Player 2, do you choose rock,paper or scissors");
            string Player2Choice = Console.ReadLine();


            if (Player1Choice == "1")
            {
                if (Player2Choice == "rock")
                {
                    Console.WriteLine("Both players chose rock");
                    Console.WriteLine("It is a tie ");
                }
                else if (Player2Choice == "paper")
                {
                    Console.WriteLine("Player 1 chose rock, Player 2 chose paper");
                    Console.WriteLine("Player 2 wins!");

                }
                else if (Player2Choice == "scissors")
                {
                    Console.WriteLine("Player 1 chose rock, Player 2 chose scissors");
                    Console.WriteLine("Player 1 wins! ");
                }
                else
                {
                    Console.WriteLine("You must choose rock,paper or scissors!");

                }

            }

            else if (Player1Choice == "2")
            {
                if (Player2Choice == "rock")
                {
                    Console.WriteLine("Player 1 chose paper, Player 2 chose rock");
                    Console.WriteLine("Player 1 wins!");

                }
                else if (Player2Choice == "paper")
                {
                    Console.WriteLine("Both players chose paper");
                    Console.WriteLine("It is a tie! ");

                }
                else if (Player2Choice == "scissors")
                {
                    Console.WriteLine("Player 1 chose paper, Player 2 chose scissors");
                    Console.WriteLine("Player 2 wins!");
                }
                else
                {
                    Console.WriteLine("You must choose rock,paper or scissors!");
                }
            }
            else if (Player1Choice == "3")
            {
                if (Player2Choice == "rock")
                {
                    Console.WriteLine("Player 1 chose scissors, Player 2 chose rock");
                    Console.WriteLine("Player 2 wins!");

                }
                else if (Player2Choice == "paper")
                {
                    Console.WriteLine("Player 1 chose scissors, Player 2 chose paper");
                    Console.WriteLine("Player 1 wins!");

                }
                else if (Player2Choice == "scissors")
                {
                    Console.WriteLine("Both players chose scissors");
                    Console.WriteLine("It is a tie!");

                }
                else
                {
                    Console.WriteLine("You must choose rock,paper or scissors!");

                }
                Console.WriteLine("Would you like to play again?");
               }
            } while (Console.ReadLine() == "yes");
        }
    }
}

---

好的，我似乎已经把它的大部分都弄明白了，在我编译它之前我不会确定。现在，我在编译这行代码时不断收到cs0019错误：while（Console.ReadLine（）.ToLower（）.ToUpper（）=“yes”）；这是我循环的结束，它需要不区分大小写，只是在正确的语法中有问题。很抱歉前面的评论，错误在另一行。好的，我一直在做这件事，现在似乎我得到了一个错误，这不是发生在原来的编码。因为我已经拿出了原来的播放器1并把它们变成了电脑，我的播放器1选择==行现在被确定为错误，我不知道为什么。该死，修复了这个问题。让它编译，循环和不区分大小写都在工作，计算机选择它，玩家选择他们的。然而，在玩家2选择他们的选择之前，计算机的选择并没有被透露出来，它也没有询问他们是否想再玩一次。另外一个问题解决了，另一个问题出现了。我已经解决了之前的所有问题，但我仍然并没有弄清楚如何让它说是计算机选择的（石头剪刀），而不是计算机选择的整数