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 = ; i <= ZheJiang.Count() - ; i++)
             { Console.WriteLine("Output:" + dics["ZJ"][i]); }
             for (int j = ; j < AnHui.Count() - ; 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 = ; i < ; 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：