HybridDictionary.IsSynchronized属性用于获取一个值,该值指示HybridDictionary是否已同步(线程安全)。
句法:
public bool IsSynchronized { get; }
返回值:该属性始终返回false 。
下面的程序说明了HybridDictionary.IsSynchronized属性的用法:
范例1:
// C# code to check whether the
// HybridDictionary is synchronized
// (thread safe).
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("I", "first");
myDict.Add("II", "second");
myDict.Add("III", "third");
myDict.Add("IV", "fourth");
myDict.Add("V", "fifth");
// To check whether the HybridDictionary
// is synchronized (thread safe).
Console.WriteLine(myDict.IsSynchronized);
}
}
输出:
False
范例2:
// C# code to check whether the
// HybridDictionary is synchronized
// (thread safe).
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");
myDict.Add("key5", "value5");
// To check whether the HybridDictionary
// is synchronized (thread safe).
Console.WriteLine(myDict.IsSynchronized);
}
}
输出:
False
注意:通过集合进行枚举本质上不是线程安全的过程。即使同步了一个集合,其他线程仍然可以修改该集合,这将导致枚举器引发异常。为了保证枚举期间的线程安全,您可以在整个枚举期间锁定集合,也可以捕获由其他线程进行的更改导致的异常。
参考:
- https://docs.microsoft.com/zh-cn/dotnet/api/system.collections.specialized.hybriddictionary.issynchronized?view=netframework-4.7.2