C#Dictionary<TKey、TValue>类使用哈希表的概念。它根据键存储值。它只包含唯一键。在键的帮助下，无涯教程可以轻松地搜索或删除元素。它位于System.Collections.Generic命名空间中。
C# Dictionary<TKey, TValue> example
让无涯教程看一个泛型Dictionary<TKey，TValue>类的示例，该类使用add()方法存储元素，并使用for-each循环迭代元素。这里，使用KeyValuePair类来获取键和值。
using System;
using System.Collections.Generic;
public class DictionaryExample
{
public static void Main(string[] args)
{
Dictionary names = new Dictionary();
names.Add("1","Sonoo");
names.Add("2","Peter");
names.Add("3","James");
names.Add("4","Ratan");
names.Add("5","Irfan");
</span><span class="kwd">foreach</span><span class="pln"> </span><span class="pun">(</span><span class="typ">KeyValuePair</span><string string=""><span class="pln"> kv </span><span class="kwd">in</span><span class="pln"> names</span><span class="pun">)</span><span class="pln">
</span><span class="pun">{</span><span class="pln">
</span><span class="typ">Console</span><span class="pun">.</span><span class="typ">WriteLine</span><span class="pun">(</span><span class="pln">kv</span><span class="pun">.</span><span class="typ">Key</span><span class="pun">+</span><span class="str">" "</span><span class="pun">+</span><span class="pln">kv</span><span class="pun">.</span><span class="typ">Value</span><span class="pun">);</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
}
输出：
1 Sonoo 2 Peter 3 James 4 Ratan 5 Irfan
