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Thread Safe Concurrent Collection 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 are the concurrent collection in C# −
| Sr.No | Type & Description |
|---|---|
| 1 | BlockingCollection<T> Bounding and blocking functionality for any type. |
| 2 | ConcurrentDictionary<TKey,TValue> Thread-safe implementation of a dictionary of key-value pairs. |
| 3 | ConcurrentQueue<T> Thread-safe implementation of a FIFO (first-in, first-out) queue. |
| 4 | ConcurrentStack<T> Thread-safe implementation of a LIFO (last-in, first-out) stack. |
| 5 | ConcurrentBag<T> Thread-safe implementation of an unordered collection of elements. |
| 6 | 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.
Create a ConcurrentStack.
ConcurrentStack<int> s = new ConcurrentStack<int>();
Add elements
s.Push(1); s.Push(2); s.Push(3); s.Push(4); s.Push(5); s.Push(6);
Let us see an example
Example
using System;
using System.Collections.Concurrent;
class Demo{
static void Main (){
ConcurrentStack s = new ConcurrentStack();
s.Push(50);
s.Push(100);
s.Push(150);
s.Push(200);
s.Push(250);
s.Push(300);
if (s.IsEmpty){
Console.WriteLine("The stack is empty!");
}
else {
Console.WriteLine("The stack isn't empty");
}
}
}
Updated on: 22-Jun-2020
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