在c#中，我想根据多个键检查字典

在做了很多教程之后，我正在制作我的第一个程序。它或多或少是一个控制台程序，我在上面输入句子，然后它做一些事情。

我有一个关键字系统，它摆脱了少于3个字符的单词，并将其他所有内容添加到动态生成的字典。

到目前为止，我一直使用ContainsKey()来检查一次一个键。我真正想做的是使用另一个字典，或者一个列表，或者一个数组来保存一堆键，以便遍历字典。

例如，如果我有一个问候语列表:

{ "hi", "hey", "hello" }

，我希望程序为每一个输出相同的文本。对于我想在字典中查找的每个单词，一定有比使用单独的if语句更好的方法。

我在这个话题上做了一些网络搜索，我一直在读一些叫做IEqualityComparer的东西，但说实话，这听起来超出了我的能力。有其他的方法来做这件事吗?或者我应该直接跳入IEqualityComparer并试图用一些我不理解的东西来混淆我的方式?

class MainClass
{
    static string Line;
    public static void Main (string[] args)
    {
        while (true) {
            if (Line == null){
                Console.WriteLine ("Enter Input");
            }
            WordChecker ();
        }
    }
    public static void WordChecker()
    {
        string inputString = Console.ReadLine ();
        inputString = inputString.ToLower();
        string[] stripChars = { 
            ";", ",", ".", "-", "_", "^", "(", ")", "[", "]", "0", "1", "2",
            "3", "4", "5", "6", "7", "8", "9", "'n", "'t", "'r" 
        };
        foreach (string character in stripChars)
        {
            inputString = inputString.Replace(character, "");
        }
        // Split on spaces into a List of strings
        List<string> wordList = inputString.Split(' ').ToList();
        // Define and remove stopwords
        string[] stopwords = new string[] { "and", "the", "she", "for", "this", "you", "but" };
        foreach (string word in stopwords)
        {
            // While there's still an instance of a stopword in the wordList, remove it.
            // If we don't use a while loop on this each call to Remove simply removes a single
            // instance of the stopword from our wordList, and we can't call Replace on the
            // entire string (as opposed to the individual words in the string) as it's
            // too indiscriminate (i.e. removing 'and' will turn words like 'bandage' into 'bdage'!)
            while ( wordList.Contains(word) )
            {
                wordList.Remove(word);
            }
        }
        // Create a new Dictionary object
        Dictionary<string, int> dictionary = new Dictionary<string, int>();
        // Loop over all over the words in our wordList...
        foreach (string word in wordList)
        {
            // If the length of the word is at least three letters...
            if (word.Length >= 3)
            {
                // ...check if the dictionary already has the word.
                if ( dictionary.ContainsKey(word) )
                {
                    // If we already have the word in the dictionary, increment the count of how many times it appears
                    dictionary[word]++;
                }
                else
                {
                    // Otherwise, if it's a new word then add it to the dictionary with an initial count of 1
                    dictionary[word] = 1;
                }
            }
            if (dictionary.ContainsKey ("math")) {
                Console.WriteLine ("What do you want me to math?");
                Math ();
            }
            if(dictionary.ContainsKey("fruit"))
            {Console.WriteLine("You said something about fruit");}
        }
    }
    public static void Math()
    {
        Console.WriteLine ("input a number");
        string input = Console.ReadLine ();
        decimal a = Convert.ToDecimal (input);
        Console.WriteLine("Tell me math function");
        string mFunction = Console.ReadLine();
        Console.WriteLine ("tell me another number");
        string inputB = Console.ReadLine();
        decimal b = Convert.ToDecimal (inputB);
        if (mFunction == "add")
        {
            Console.WriteLine (a + b);
        }
        else if (mFunction == "subtract")
        {
            Console.WriteLine (a - b);
        }
        else if (mFunction == "multiply")
        {
            Console.WriteLine (a * b);
        }
        else if (mFunction == "divide")
        {
            Console.WriteLine (a / b);
        }
        else
        {
            Console.WriteLine ("not a math");
        }
    }
    public static void Greetings()
    {
    }
}

注意:我从网上找到的一个例子中得到了动态字典和单词解析器，并对其进行了一些修改以适应我的需要。我不可能自己想出它，但我确实觉得我理解其中的代码。

Dictionary<string, string> keyLookup = new Dictionary<string, string>();
keyLookup["hey"] = "greeting";
keyLookup["hi"] = "greeting";
keyLookup["hello"] = "greeting";
Dictionary<string, int> wordLookup = new Dictionary<string, int>();
wordLookup["greeting"] = 1;

public int GetWordCount(string word)
{
    string foundKey = keyLookup[word];
    int numOccurences = wordLookup[foundKey];
    return numOccurences;
}