或者像这样:

List< KeyValuePair< string, int > > theList =
    new List< KeyValuePair< string,int > >(this.yourDictionary);

for ( int i = 0; i < theList.Count; i++)
{ 
  // the key
  Console.WriteLine(theList[i].Key);
}

你应该可以只看。

    Dictionary<string, int> data = new Dictionary<string, int>();
    data.Add("abc", 123);
    data.Add("def", 456);
    foreach (string key in data.Keys)
    {
        Console.WriteLine(key);
    }

List<string> keyList = new List<string>(this.yourDictionary.Keys);

我真不敢相信这些令人费解的答案。假设键的类型是:string(或者使用'var'如果你是一个懒惰的开发人员):-

List<string> listOfKeys = theCollection.Keys.ToList();

我经常使用这个来获取字典中的键和值:

 For Each kv As KeyValuePair(Of String, Integer) In layerList

 Next

(layerList类型为Dictionary(of String, Integer))

对于混合字典，我使用这个:

List<string> keys = new List<string>(dictionary.Count);
keys.AddRange(dictionary.Keys.Cast<string>());