HybridDictionary.IsFixedSize属性用于获取一个值,该值指示HybridDictionary是否具有固定大小。
句法:
public bool IsFixedSize { get; }
返回值:该属性始终返回false 。
下面的程序说明了HybridDictionary.IsFixedSize属性的使用:
范例1:
// C# code to check whether the
// HybridDictionary has a fixed size.
using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
// Driver code
public static void Main()
{
// Creating a HybridDictionary named myDict
HybridDictionary myDict = new HybridDictionary();
// Adding key/value pairs in myDict
myDict.Add("A", "Apple");
myDict.Add("B", "Banana");
myDict.Add("C", "Cat");
myDict.Add("D", "Dog");
myDict.Add("E", "Elephant");
myDict.Add("F", "Fish");
// To check whether the HybridDictionary
// has a fixed size.
Console.WriteLine(myDict.IsFixedSize);
}
}
输出:
False
范例2:
// C# code to check whether the
// HybridDictionary has a fixed size.
using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
// Driver code
public static void Main()
{
// Creating a HybridDictionary named myDict
HybridDictionary myDict = new HybridDictionary();
// Adding key/value pairs in myDict
myDict.Add("key1", "value1");
myDict.Add("key2", "value2");
myDict.Add("key3", "value3");
myDict.Add("key4", "value4");
// To check whether the HybridDictionary
// has a fixed size.
Console.WriteLine(myDict.IsFixedSize);
}
}
输出:
False
笔记:
- 具有固定大小的集合不允许在创建集合后添加或删除元素,但是可以修改现有元素。
- 检索此属性的值是O(1)操作。
参考:
- https://docs.microsoft.com/zh-cn/dotnet/api/system.collections.specialized.hybriddictionary.isfixedsize?view=netframework-4.7.2