C＃|为SortedList对象创建一个同步的(线程安全的)包装器

SortedList.Synchronized(SortedList)方法用于获取SortedList对象的同步(线程安全)包装。

句法：

public static System.Collections.SortedList Synchronized (System.Collections.SortedList list);

在此， list是要同步的SortedList对象的名称。

异常：如果列表为null，则此方法将引发ArgumentNullException

下面的程序说明了上面讨论的方法的使用：

范例1：

// C# code to create a synchronized
// (thread-safe) wrapper for a
// SortedList object
using System;
using System.Collections;
  
class GFG {
  
    // Driver code
    public static void Main()
    {
  
        // Creating an SortedList
        SortedList mySortedList = new SortedList();
  
        // Adding elements to SortedList
        mySortedList.Add("1", "one");
        mySortedList.Add("2", "two");
        mySortedList.Add("3", "three");
        mySortedList.Add("4", "four");
        mySortedList.Add("5", "five");
  
        // Creating a synchronized wrapper
        // around the SortedList.
        SortedList mySortedList_1 = 
            SortedList.Synchronized(mySortedList);
  
        // --------- Using IsSynchronized Property
  
        // print the status of both SortedList
        Console.WriteLine("mySortedList SortedList is {0}.",
              mySortedList.IsSynchronized ? "synchronized" : 
                                         "not synchronized");
  
        Console.WriteLine("mySortedList_1 SortedList is {0}.",
              mySortedList_1.IsSynchronized ? "synchronized" : 
                                          "not synchronized");
    }
}

输出：

mySortedList SortedList is not synchronized.
mySortedList_1 SortedList is synchronized.

范例2：

// C# code to create a synchronized
// (thread-safe) wrapper for a
// SortedList object
using System;
using System.Collections;
  
class GFG {
  
    // Driver code
    public static void Main()
    {
  
        // Creating an SortedList
        SortedList mySortedList = new SortedList();
  
        // Adding elements in SortedList 
        mylist.Add("4", "Even"); 
        mylist.Add("9", "Odd"); 
        mylist.Add("5", "Odd and Prime"); 
        mylist.Add("2", "Even and Prime"); 
  
        // it will give runtime error as
        // table parameter can't be null
        SortedList my2 = SortedList.Synchronized(null);
    }
}

运行时错误：

Unhandled Exception:
System.ArgumentNullException: Value cannot be null.
Parameter name: list

注意：为了确保SortedList对象的线程安全，所有操作必须仅通过此包装器完成。

参考：

• https://docs.microsoft.com/zh-cn/dotnet/api/system.collections.sortedlist.synchronized?view=netframework-4.7.2