C#中的Dictionary的使用

在工作中有时候会用到Dictionary，由于自己之前没用过，参考了一下前人和先辈的实践，仿照着写了一个Test，第一次用还不是很熟练，要多实践练习才能用的得心应手，写代码重在敲键盘，以此为诫。（主要注意下这个Dictionary的key和value以及添加数据方式）

写了三个方法和一个Student类。

namespace DictionaryTest
{
    class Program
    {
        static void Main(string[] args)
        {
            DicSample1();
            DicSample2();
            DicSample3();
            Console.ReadLine();
        }

        public static void DicSample1()
        {
            Dictionary<string, string> dic = new Dictionary<string, string>();
            if (dic.ContainsKey("Item1") == false)
            {
                dic.Add("Item1", "ZheJiang");
            }
            if (dic.ContainsKey("Item2") == false)
            {
                dic.Add("Item2", "ShangHai");
            }
            else
            {
                dic["Item2"] = "ShangHai";
            }
            if (dic.ContainsKey("Item3") == false)
            {
                dic.Add("Item3", "BeiJing");
            }
            if (dic.ContainsKey("Item1"))
            {
                Console.WriteLine("Output:" + dic["Item1"]);
            }
            //遍历key
            foreach (var key in dic.Keys)
            {
                Console.WriteLine("Output key :{0}" , dic.Keys);
            }
            //遍历value
            foreach (var value in dic.Values)
            {
                Console.WriteLine("Output value :{0}", dic.Values);
            }

            foreach (var d in dic)
            {
                Console.WriteLine("Output key:{0}, value:{1}", d.Key, d.Value);
            }
        }

        public static void DicSample2()
        {
            Dictionary<string, string[]> dics = new Dictionary<string, string[]>();
            string[] ZheJiang = { "Hangzhou", "Huzhou", "Taizhou", "Wenzhou", "Quzhou" };
            string[] AnHui = { "Hefei", "Wuhu", "Huainan", "Fuyang", "Huangshan" };
            dics.Add("ZJ", ZheJiang);
            dics.Add("AH", AnHui);
            for (int i = 0; i <= ZheJiang.Count() - 1; i++)
            { Console.WriteLine("Output:" + dics["ZJ"][i]); }
            for (int j = 0; j < AnHui.Count() - 1; j++)
            { Console.WriteLine("Output:" + dics["AH"][j]); }
        }

        public static void DicSample3()
        {
            Dictionary<string, Student> dics = new Dictionary<string, Student>();
            Student student = null;
            for (int i = 0; i < 3; i++)
            {
                student = new Student();
                student.Num = i.ToString();
                student.Name = "Student Name" + i.ToString();
                dics.Add(i.ToString(), student);
            }
            foreach (var stuItem in dics)
            {
                Console.WriteLine("Output: key{0},Num{1},Name{2}", stuItem.Key, stuItem.Value.Num, stuItem.Value.Name);
            }
        }
    }
    public class Student
    {
        public string Name { get; set; }
        public string Num { get; set; }
    }
}

以下是运行结果：