public static void Main(string[] args)

{

    Dictionary<string,string> dictionary =new Dictionary<string, string>();

    dictionary["engine1"] = "unity";

    dictionary["engine2"] = "cocos";

    //方法一

    var array = dictionary.ToArray();

    for (int idx = ; idx < array.Count(); idx++)

    {

        var itemKey = array[idx].Key;

        var itemValue = array[idx].Value;

        Console.Write("key:{0} ,value:{1}\n", itemKey, itemValue);

    }

    //方法二

    for (int index = ; index < dictionary.Count; index++)

    {

        //根据索引获取

        var item = dictionary.ElementAt(index);

        var itemKey = item.Key;

        var itemValue = item.Value;

        Console.Write("\nkey:{0} ,value:{1}\n", itemKey, itemValue);

    }

}

static void Main(string[] args)

{

    Dictionary<string, string> dict = new Dictionary<string, string>();

    dict.Add("C#", "4.5");

    dict.Add("Java", "");

    dict.Add("Python", "");

    Dictionary<string, string>.Enumerator etor = dict.GetEnumerator();

    while (etor.MoveNext())

    {

        Console.WriteLine("key = {0}, value = {1}",etor.Current.Key, etor.Current.Value);

    }

}