Multithreading C# : Part 01

Multithreading with C#

Think about old days, you have one central processing unit (CPU) in your pc which is capable of executing one operation at a time. If we have 5 operations to run then we have to wait till one operation is completed and then only other one can start. What will happen if the running operation has a bug and got stuck, then whole computer going to be freeze and useless unless we restart it. This is a huge problem. So if we can run multiple operation in the same time that would be great because it will solve this problem.

Thread?

A thread is something like a virtualized CPU.

What is Multithreading?

Capability of subdividing operations in to individual threads within a single application. Those individual threads are capable of running in parallel. The operating system divides processing time among different applications and also among each thread within the application.    

Multithreading with C#

With C# you can write applications that perform multiple tasks at the same time. Tasks with the potential of holding up other tasks can execute on separate threads, a process known as multithreading or free threading.

The Thread class can be found in the System. Threading namespace. This class enables you to create new treads, manage their priority, and get their status.

using System.Threading;

Creating a thread with the Thread class

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
 
namespace Multithreading
{
    public static class Program
    {
        //Thread method
        public static void ExampleThreadMethod()
        {
            for(int x=0 ; x<10; x++)
            {
                Console.WriteLine("ExampleThreadMethod: {0}", x);
 
                //Thread.Sleep(0)? 
                //It is used to signal to Windows that
                //this thread is finished. 
                //In- stead of waiting for 
                //the whole time-slice of the thread to finish, 
                //it will immediately switch to another thread.
                Thread.Sleep(0); 
            }
        }
 
        //Main method
        public static void Main(string[] args)
        {
            Thread thread = new Thread(new ThreadStart(ExampleThreadMethod));
            thread.Start();
 
            for (int y = 0; y < 4; y++)
            {
                Console.WriteLine("Main thread: Do some work.");
 
                //Thread.Sleep(0)? 
                //It is used to signal to Windows that
                //this thread is finished. 
                //In- stead of waiting for 
                //the whole time-slice of the thread to finish, 
                //it will immediately switch to another thread.
                Thread.Sleep(0); 
            }
 
            //The Thread.Join() method 
            //is called on the main thread to 
            //let it wait until the other thread finishes. 
            thread.Join();
        }
 
    }
}

 

When you are running the application put some break points on two for loops in main method and ExampleThreadMethod method and try to understand the executing of two methods.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thank You :)