使用c#语言编写一个控制台程序，随机生成一个英文单词。游戏一开始，目标单词以星号显示，每次用户猜测其中一个字母。如果猜对了，则下一次猜时显示出该字母在目标单词中的（所有）位置。重复猜测，直到用户猜对为止。最终统计出用户猜测的次数和一次都没猜对字母的次数

在C#中编写一个简单的控制台程序，用于随机生成英文单词并进行字母猜测游戏，可以按照以下步骤操作：

using System;
using System.Collections.Generic;
using System.Linq;

namespace WordGuessGame
{
    class Program
    {
        static void Main(string[] args)
        {
            string secretWord = GetRandomWord();
            char[] guessedChars = new char[secretWord.Length];
            int correctGuesses = 0;
            int incorrectGuesses = 0;

            Console.WriteLine("Welcome to the Word Guess Game! Type 'quit' to exit.");
            while (true)
            {
                Console.Write($"Current word is _{string.Join("_", guessedChars)}_ ");
                string input = Console.ReadLine().ToUpper();

                if (input == "QUIT")
                    break;

                if (!char.IsLetter(input))
                {
                    Console.WriteLine("Invalid input. Please enter a single letter.");
                    continue;
                }

                if (guessedChars.Any(charChar => charChar == input))
                {
                    Console.WriteLine("You have already guessed that letter. Try again.");
                    continue;
                }

                guessedChars = ReplaceInArray(guessedChars, input);

                if (IsCorrect(secretWord, guessedChars))
                {
                    Console.WriteLine($"Congratulations! You found all the letters in {secretWord}.\n");
                    correctGuesses++;
                    PrintStats(correctGuesses, incorrectGuesses);
                    break;
                }
                else
                {
                    Console.WriteLine("Incorrect guess. Here's the updated word:");
                    PrintUpdatedWord(secretWord, guessedChars);
                    incorrectGuesses++;
                }
            }
        }

        // Generate a random word from a predefined list or fetch it from an API
        private static string GetRandomWord()
        {
            // Add your word list here or fetch from an external source like Wordnik API
            List<string> words = new List<string>{"apple", "banana", "cherry", "orange", "kiwi"};
            return words[new Random().Next(words.Count)];
        }

        // Replace the input character with '*' in the guessedChars array if not already present
        private static char[] ReplaceInArray(char[] arr, char input)
        {
            for (int i = 0; i < arr.Length; i++)
            {
                if (arr[i] == '_')
                    arr[i] = input;
            }
            return arr;
        }

        // Check if the user has correctly guessed the secret word by comparing arrays
        private static bool IsCorrect(string secretWord, char[] guessedChars)
        {
            return secretWord.SequenceEqual(guessedChars.Replace('_', string.Empty));
        }

        // Print statistics after the game ends
        private static void PrintStats(int correctGuesses, int incorrectGuesses)
        {
            Console.WriteLine($"Total guesses made: {correctGuesses + incorrectGuesses}");
            Console.WriteLine($"Letters not guessed at all: {secretWord.Distinct() - new string(guessedChars).Distinct()}");
        }

        // Print the secret word with underscores showing where each letter was guessed
        private static void PrintUpdatedWord(string secretWord, char[] guessedChars)
        {
            Console.Write(secretWord);
        }
    }
}

在这个程序中，首先定义了一个`GetRandomWord`函数来获取一个随机单词，然后通过循环让用户输入字母进行猜测。玩家每猜对一个字母，就更新`guessedChars`数组，并检查是否全部猜对。如果猜错，会打印当前状态并继续游戏。游戏结束后，会计算正确的猜测数和未猜到的字母数。