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Stack.IsSynchronized Property

Gets a value indicating whether access to the Stack is synchronized (thread safe).

Namespace: System.Collections
Assembly: mscorlib (in mscorlib.dll)

public:
virtual property bool IsSynchronized {
	bool get ();
}
/** @property */
public boolean get_IsSynchronized ()

public function get IsSynchronized () : boolean

Not applicable.

Property Value

true, if access to the Stack is synchronized (thread safe); otherwise, false. The default is false.

To guarantee the thread safety of the Stack, all operations must be done through the wrapper returned by the Synchronized method.

Enumerating through a collection is intrinsically not a thread-safe procedure. Even when a collection is synchronized, other threads can still modify the collection, which causes the enumerator to throw an exception. To guarantee thread safety during enumeration, you can either lock the collection during the entire enumeration or catch the exceptions resulting from changes made by other threads.

The following code example shows how to lock the collection using the SyncRoot during the entire enumeration.

No code example is currently available or this language may not be supported.

Retrieving the value of this property is an O(1) operation.

The following example shows how to synchronize a Stack, determine if a Stack is synchronized, and use a synchronized Stack.

#using <system.dll>

using namespace System;
using namespace System::Collections;
int main()
{
   
   // Creates and initializes a new Stack.
   Stack^ myStack = gcnew Stack;
   myStack->Push( "The" );
   myStack->Push( "quick" );
   myStack->Push( "brown" );
   myStack->Push( "fox" );
   
   // Creates a synchronized wrapper around the Stack.
   Stack^ mySyncdStack = Stack::Synchronized( myStack );
   
   // Displays the sychronization status of both Stacks.
   Console::WriteLine( "myStack is {0}.", myStack->IsSynchronized ? (String^)"synchronized" : "not synchronized" );
   Console::WriteLine( "mySyncdStack is {0}.", mySyncdStack->IsSynchronized ? (String^)"synchronized" : "not synchronized" );
}

/*
This code produces the following output.

myStack is not synchronized.
mySyncdStack is synchronized.
*/

import System.*;
import System.Collections.*;

public class SamplesStack
{
    public static void main(String[] args)
    {
        // Creates and initializes a new Stack.
        Stack myStack = new Stack();

        myStack.Push("The");
        myStack.Push("quick");
        myStack.Push("brown");
        myStack.Push("fox");

        // Creates a synchronized wrapper around the Stack.
        Stack mySyncdStack = Stack.Synchronized(myStack);

        // Displays the sychronization status of both Stacks.
        Console.WriteLine("myStack is {0}.", 
            (myStack.get_IsSynchronized()) ? 
            "synchronized" : "not synchronized");
        Console.WriteLine("mySyncdStack is {0}.", 
            (mySyncdStack.get_IsSynchronized()) ? 
            "synchronized" : "not synchronized");
    } //main

} //SamplesStack

/* 
 This code produces the following output.
 
 myStack is not synchronized.
 mySyncdStack is synchronized.
 */

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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