Make your collections thread-safe in C#

.NET Framework 4 introduced the System.Collections.Concurrent namespace. It has several thread-safe and extensible collection classes. These collections are called concurrent collections because they can be accessed by multiple threads at the same time.

The following concurrent collection types use lightweight synchronization mechanisms: SpinLock, SpinWait, etc. These are new features in .NET Framework 4.

Let’s look at concurrent collections in C# -

type	describe
Blocking Collection	Any type of border and blocking functionality.
Concurrency Dictionary	Thread-safe implementation of key-value dictionary.
Concurrent Queue	Thread-safe implementation of FIFO (first in, first out) queue.
Concurrency stack	Thread-safe implementation of LIFO (last in, first out) stack.
Concurrency package	Thread-safe implementation of unordered element collection.
IProducerConsumerCollection	Interfaces that types must implement to be used in BlockingCollection

Let's see how to use ConcurrentStack, which 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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