我如何遍历字典的哈希集

Question

提前致歉；我正在尝试学习C＃的第3天。

我被指示建立字典的哈希表；没问题。我看到那已经建立。我现在需要遍历哈希集，如果字典的键！=特定字符串，则将条目复制到新列表中。有人可以解释一下完成此看似简单任务的正确语法吗？

var goodSongs = new List<Dictionary<string,string>>();

var allSongs = new HashSet<Dictionary<string, string>>();

Dictionary<string, string> meatloaf = new Dictionary<string, string>();
meatloaf.Add("Meatloaf", "Paradise By The Dashboard Light");

Dictionary<string, string> aerosmith = new Dictionary<string,string>();
aerosmith.Add("Aerosmith", "Cryin'");

Dictionary<string, string> nickelback = new Dictionary<string, string>();
nickelback.Add("Nickelback", "Rockstar");

allSongs.Add(nickelback);
allSongs.Add(aerosmith);
allSongs.Add(meatloaf);

//foreach loop to iterate dictionaries goes here

目标-要摆脱困境，希望学习C＃，并决定我是否要继续努力下去。谢谢大家。

Answer 1

这是一个如何遍历哈希集然后遍历字典的示例：

        var all = new HashSet<Dictionary<string, string>>();

        Dictionary<string, string> newDict = new Dictionary<string, string>();
        newDict.Add("M", "T");
        all.Add(newDict);

        foreach(Dictionary<string,string> dict in all)
        {
            foreach(KeyValuePair<string,string> pair in dict)
            {
                string key = pair.Key;
                string value = pair.Value;
            }
        }