C#教程之用C#中的键值对遍历数组或字符串元素的

代码如下:

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string strs = "ad6la4ss42d6s3";            Dictionary<char, int> dic = new Dictionary<char, int>();            foreach(var item in strs)            {                if (dic.Keys.Contains(item))                {                    dic[item]++;                }                else                {                    dic.Add(item,1);                }            }            foreach (var s in dic)            {                Console.WriteLine("字符：{0}，出现次数为{1}",s.Key,s.Value);            }