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Thread-based parallelism in C#
In C#, Task parallelism divide tasks. The tasks are then allocated to separate threads for processing. In .NET, you have the following mechanisms to run code in parallel: Thread, ThreadPool, and Task. For parallelism, use tasks in C# instead of Threads.
A task will not create its own OS thread, whereas they are executed by a TaskScheduler.
Let us see how to create tasks. Use a delegate to start a task −
Task tsk = new Task(delegate { PrintMessage(); });
tsk.Start();Use Task Factory to start a task −
Task.Factory.StartNew(() => {Console.WriteLine("Welcome!"); });You can also use Lambda −
Task tsk = new Task( () => PrintMessage() ); tsk.Start();
The most basic way to start a task is using the run() −
Example
using System;
using System.Threading.Tasks;
public class Example {
public static void Main() {
Task tsk = Task.Run(() => {
int a = 0;
for (a = 0; a <= 1000; a++) {}
Console.WriteLine("{0} loop iterations ends", a);
});
tsk.Wait();
}
}Output
1001 loop iterations ends
Updated on: 22-Jun-2020
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