// 声明Dictionary并初始化            Dictionary
     
       dic = new Dictionary
      
       () {                 {
    "1", "one"},                {
    "2", "two"},                {
    "3", "three"}            };            // 获得KeyList            List
       
         keyList = dic.Keys.ToList();            // 获得ValueList            List
        
          valueList = dic.Values.ToList();                        // 获得KeyValuePairList            List
         
          
           > kvList = dic.ToList(); // KeyValuePairList -> Dictionary Dictionary
           
             dic2 = kvList.ToDictionary(item => item.Key, item => item.Value); // 在KeyValuePairList中添加一个重复Key，转换为Dictionary时异常 kvList.Add(new KeyValuePair
            
             ("1", "1")); Dictionary
             
               dic3 = kvList.ToDictionary(item => item.Key, item => item.Value); // 发生异常