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Make your collections thread-safe in C#
The .NET Framework 4 brought the System.Collections.Concurrent namespace. This has several collection classes that are thread-safe and scalable. These collections are called concurrent collections because they can be accessed by multiple threads at a time.
The following concurrent collection types use lightweight synchronization mechanisms: SpinLock, SpinWait, etc. These are new in .NET Framework 4.
Let us see the concurrent collection in C# −
| Type | Description |
|---|---|
| BlockingCollection<T> | Bounding and blocking functionality for any type. |
| ConcurrentDictionary<TKey,TValue> | Thread-safe implementation of a dictionary of key-value pairs. |
| ConcurrentQueue<T> | Thread-safe implementation of a FIFO (first-in, first-out) queue. |
| ConcurrentStack<T> | Thread-safe implementation of a LIFO (last-in, first-out) stack. |
| ConcurrentBag<T> | Thread-safe implementation of an unordered collection of elements. |
| IProducerConsumerCollection<T> | The interface that a type must implement to be used in a BlockingCollection |
Let us see how to work with ConcurrentStack<T> that is a thread-safe last in-first out (LIFO) collection −
ConcurrentStack<int> cs = new ConcurrentStack<int>(); cs.Push(95); cs.Push(120); cs.Push(130);
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