blocks|key|450840|text|不，根据msdn的说法|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|450841|此类型的|450842|公共静态(在Visual+Basic中为Shared)成员是线程安全的。不能保证任何实例成员都是线程安全的。|blockquote|450843|450844|450845|您应该使用并发集合(msdn。|450846|BlockingCollection为实现IProducerConsumerCollection的任何类型提供绑定和阻塞功能。|style|BOLD|450847|键值对字典的ConcurrentDictionary线程安全实现|450848|先进先出(先进先出)队列的ConcurrentQueue线程安全实现。|450849|后进先出(+ConcurrentStack+)堆栈的后进先出(+LIFO+)线程安全实现。|450850|元素无序集合的ConcurrentBag线程安全实现。|450851|IProducerConsumerCollection要在BlockingCollection中使用的类型必须实现的接口。|450852|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/pl-pl/library/6sh2ey19(v=vs.110).aspx)|1|http://msdn.microsoft.com/en-us/library/dd997305(v=vs.110%2529.aspx)^0|4|4|0|0|0|0|0|0|A|4|1|0|0|I|0|6|K|0|D|F|0|6|F|0|7|D|0|0|R|0^^$0|@$1|2|3|4|5|6|7|1A|8|@]|9|@$A|1B|B|1C|1|1D]]|C|$]]|$1|D|3|E|5|6|7|1E|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|1F|8|@]|9|@]|C|$]]|$1|I|3|-4|5|6|7|1G|8|@]|9|@]|C|$]]|$1|J|3|-4|5|6|7|1H|8|@]|9|@]|C|$]]|$1|K|3|L|5|6|7|1I|8|@]|9|@$A|1J|B|1K|1|1L]]|C|$]]|$1|M|3|N|5|6|7|1M|8|@$A|1N|B|1O|O|P]]|9|@]|C|$]]|$1|Q|3|R|5|6|7|1P|8|@$A|1Q|B|1R|O|P]]|9|@]|C|$]]|$1|S|3|T|5|6|7|1S|8|@$A|1T|B|1U|O|P]]|9|@]|C|$]]|$1|U|3|V|5|6|7|1V|8|@$A|1W|B|1X|O|P]]|9|@]|C|$]]|$1|W|3|X|5|6|7|1Y|8|@$A|1Z|B|20|O|P]]|9|@]|C|$]]|$1|Y|3|Z|5|6|7|21|8|@$A|22|B|23|O|P]]|9|@]|C|$]]|$1|10|3|-4|5|6|7|24|8|@]|9|@]|C|$]]]|11|$12|$5|13|14|15|C|$16|17]]|18|$5|13|14|15|C|$16|19]]]]

No, according to <a href="http://msdn.microsoft.com/pl-pl/library/6sh2ey19(v=vs.110).aspx" rel="nofollow">msdn</a>:

<blockquote>
 Public static (Shared in Visual Basic) members of this type are thread
 safe. Any instance members are not guaranteed to be thread safe.
</blockquote>

You should use concurrent collections (<a href="http://msdn.microsoft.com/en-us/library/dd997305(v=vs.110).aspx" rel="nofollow">msdn</a>).

BlockingCollection Provides bounding and blocking functionality for any type that implements IProducerConsumerCollection.

ConcurrentDictionary
Thread-safe implementation of a dictionary of key-value pairs

ConcurrentQueue
Thread-safe implementation of a FIFO (first-in, first-out) queue.

ConcurrentStack
Thread-safe implementation of a LIFO (last-in, first-out) stack.

ConcurrentBag
Thread-safe implementation of an unordered collection of elements.

IProducerConsumerCollection
The interface that a type must implement to be used in a BlockingCollection.

blocks|key|5599126|text|不是|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5599127|以下是Thread+Safe+Collections的列表|offset|length|5599128|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/dd997305(v=vs.110).aspx^0|0|3|N|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

No

here is a list of <a href="http://msdn.microsoft.com/en-us/library/dd997305(v=vs.110).aspx" rel="nofollow">Thread Safe Collections</a>

blocks|key|450857|text|不，他们两个都不是。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|450858|使其线程安全的最简单方法是lock对底层集合的所有访问(读和写)。当然，根据您的实际问题，使用另一个线程安全的集合可能会更好。|offset|length|style|CODE|450859|entityMap^0|0|D|4|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

No, neither of them is.

The simplest way to make it thread-safe is to <code>lock</code> all the access to the underlying collections (read and write). Of course, depending on your actual problem, it might simply be better to use a different collection, one that is thread-safe.

blocks|key|3487270|text|看看我使用reader+Writer锁的实现，如果你真的需要一个，但你最好使用Cocurrent+API，它们由MS保证。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3487271|Creating+Thread+Safe+List+using+Reader+Writer+Lock|offset|length|3487272|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/25681321/creating-thread-safe-list-using-reader-writer-lock^0|0|0|1E|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

Check out my implementation using reader Writer lock, in case you really need one, but you would be better off using the Cocurrent APIs, they are guaranteed by MS

<a href="https://stackoverflow.com/questions/25681321/creating-thread-safe-list-using-reader-writer-lock">Creating Thread Safe List using Reader Writer Lock</a>

blocks|key|450869|text|可以使用该集合的SyncRoot属性使其成为线程安全的msdn|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|450870|ICollection+myCollection+=+someCollection;
lock(myCollection.SyncRoot)
{
++++foreach+(object+item+in+myCollection)
++++{
++++++++//+Insert+your+code+here.
++++}
}|code-block|syntax|javascript|450871|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.collections.icollection.syncroot(v=vs.110).aspx^0|R|4|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

You can use SyncRoot property of the collection to make it thread safe 
<a href="http://msdn.microsoft.com/en-us/library/system.collections.icollection.syncroot(v=vs.110).aspx" rel="nofollow">msdn</a>

<pre><code>ICollection myCollection = someCollection;
lock(myCollection.SyncRoot)
{
 foreach (object item in myCollection)
 {
 // Insert your code here.
 }
}
</code></pre>

blocks|key|3487287|text|ArrayList/List不是线程安全集合。我们可以使ArrayList成为线程安全的，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3487288|using+System;
using+System.Collections;
public+class+SamplesArrayList++
{
+++public+static+void+Main()++
+++{++++++
++++++//+Creates+and+initializes+a+new+ArrayList.+It+is+thread+safe+ArrayList
++++++ArrayList+myAL+=+new+ArrayList();
++++++myAL.Add(+"The"+);
++++++myAL.Add(+"quick"+);
++++++myAL.Add(+"brown"+);
++++++myAL.Add(+"fox"+);

++++++//+Creates+a+synchronized+wrapper+around+the+ArrayList.
++++++ArrayList+mySyncdAL+=+ArrayList.Synchronized(myAL);

++++++//+Displays+the+sychronization+status+of+both+ArrayLists.
++++++Console.WriteLine(+"myAL+is+{0}.",+myAL.IsSynchronized+?+"synchronized"+:+"not+synchronized"+);
++++++Console.WriteLine(+"mySyncdAL+is+{0}.",+mySyncdAL.IsSynchronized+?+"synchronized"+:+"not+synchronized"+);

+++}
}|code-block|syntax|javascript|3487289|此代码生成以下输出。|3487290|myAL未同步。mySyncdAL已同步。|3487291|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

ArrayList/List is not a thread safe collection. We can make ArrayList a thread safe like:

<pre><code>using System;
using System.Collections;
public class SamplesArrayList 
{
 public static void Main() 
 { 
 // Creates and initializes a new ArrayList. It is thread safe ArrayList
 ArrayList myAL = new ArrayList();
 myAL.Add( "The" );
 myAL.Add( "quick" );
 myAL.Add( "brown" );
 myAL.Add( "fox" );

 // Creates a synchronized wrapper around the ArrayList.
 ArrayList mySyncdAL = ArrayList.Synchronized(myAL);

 // Displays the sychronization status of both ArrayLists.
 Console.WriteLine( "myAL is {0}.", myAL.IsSynchronized ? "synchronized" : "not synchronized" );
 Console.WriteLine( "mySyncdAL is {0}.", mySyncdAL.IsSynchronized ? "synchronized" : "not synchronized" );

 }
}
</code></pre>

This code produces the following output.

myAL is not synchronized.
mySyncdAL is synchronized.

Is ArrayList/List a thread safe collection? If not how would you make it thread safe?

Is ArrayList/List a thread safe collection? If not how would you make it thread safe?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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ArrayList/List是线程安全的集合吗？如果不是，你怎么让它线程安全呢？

问ArrayList/List是线程安全的集合吗？如果不是，你怎么让它线程安全呢？
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问ArrayList/List是线程安全的集合吗？如果不是，你怎么让它线程安全呢？EN