c# - 信息重新 : add/remove methods in stringLists

Question

当前代码目前编译正常，如果发现重复项，它会自动删除。无论如何，用户可以选择是否要在删除之前保留副本。或者我可以看看是否有其他合适的方法。

 static void Main(string[] args)
    {
        List<string> dictionaryList = new List<string>();
        string input;

        Console.Write("Please enter a string or END to finish: ");
        input = Console.ReadLine();
        while (input.ToUpper() != "END")
        {
            if (!dictionaryList.Contains(input)) // This is where i am looking of a user response of y/n too add duplicate string

            dictionaryList.Add(input);

            Console.Write("Please enter a string or END to finish: ");
            input = Console.ReadLine();

        }

        dictionaryList.Sort();
        Console.WriteLine("Dictionary Contents:");
        foreach (string wordList in dictionaryList)
            Console.WriteLine("\t" + wordList);
    }
}
}

Answer 1

这应该可以解决问题:

while (input.ToUpper() != "END")
{
    bool blnAdd = true;
    if (dictionaryList.Contains(input))
    {
        Console.Write("Already exists, keep the duplicate? (Y/N)");
        blnAdd = Console.ReadLine().Equals("Y");
    }

    if (blnAdd)
        dictionaryList.Add(input);

    Console.Write("Please enter a string or END to finish: ");
    input = Console.ReadLine();
}

代码背后的逻辑:如果输入已存在于列表中，则提醒用户并阅读他的答案 - 仅当 Y 添加该项目时。