ListDictionary()构造函数用于使用默认比较器初始化ListDictionary类的新的空实例。 ListDictionary是一个专门的集合。它位于System.Collections.Specialized命名空间下。此类型表示非通用词典类型。它通过链表实现。此类是针对小型列表的字典集合( System.Collections.IDictionary
句法：
public ListDictionary ();范例1：
// C# Program to illustrate how
// to create a ListDictionary
using System;
using System.Collections;
using System.Collections.Specialized;
class Geeks {
// Main Method
public static void Main(String[] args)
{
// ld is the ListDictionary object
// ListDictionary() is the constructor
// used to initializes a new
// instance of the ListDictionary class
ListDictionary ld = new ListDictionary();
// Count property is used to get the
// number of elements in ListDictionary
// It will give 0 as no elements
// are present currently
Console.WriteLine("The number of elements: "+
ld.Count);
}
}
输出：
The number of elements: 0
范例2：
// C# Program to illustrate how
// to create a ListDictionary
using System;
using System.Collections;
using System.Collections.Specialized;
class Geeks {
// Main Method
public static void Main(String[] args)
{
// ld is the ListDictionary object
// ListDictionary() is the constructor
// used to initializes a new
// instance of the ListDictionary class
ListDictionary ld = new ListDictionary();
Console.Write("Before Add Method: ");
// Count property is used to get the
// number of elements in ListDictionary
// It will give 0 as no elements
// are present currently
Console.WriteLine(ld.Count);
// Adding key/value pairs in ld
ld.Add("Australia", "Canberra");
ld.Add("Belgium", "Brussels");
ld.Add("Netherlands", "Amsterdam");
ld.Add("China", "Beijing");
ld.Add("Russia", "Moscow");
ld.Add("India", "New Delhi");
Console.Write("After Add Method: ");
// Count property is used to get the
// number of elements in ld
Console.WriteLine(ld.Count);
}
}
输出：
Before Add Method: 0
After Add Method: 6
参考：
- https://docs.microsoft.com/zh-cn/dotnet/api/system.collections.specialized.listdictionary.-ctor?view=netframework-4.7.2#System_Collections_Specialized_ListDictionary__ctor