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How To Use Multi-Threading in C#

In C#, the System.Threading.Thread class is utilized for working with the thread. It permits making and getting to the individual thread in a multi-threaded application. The principal thread to be executed in a procedure is known as the principle thread. At the point when a C# program begins execution, the fundamental thread is consequently made.

Example with image shown below, 
Step 1: Create a Window form with three buttons (image given below).
 
 

Step 2: Write the code on the button click and Form1_Load like the example, given below:
  1. using System;  
  2. using System.Collections.Generic;  
  3. using System.ComponentModel;  
  4. using System.Data;  
  5. using System.Drawing;  
  6. using System.Linq;  
  7. using System.Text;  
  8. using System.Windows.Forms;  
  9. using System.Threading;  
  10.   
  11. namespace ThreadApplication  
  12. {  
  13.     public partial class Form1 : Form  
  14.     {  
  15.         public Form1()  
  16.         {  
  17.             InitializeComponent();  
  18.         }  
  19.   
  20.         private void btnTh1_Click(object sender, EventArgs e)  
  21.         {  
  22.              
  23.               
  24.             Thread th = new Thread(t =>  
  25.             {  
  26.   
  27.                 for (int i = 0; i <= 100; i++)  
  28.                 {  
  29.                     int Width = rd.Next(0, this.Width);  
  30.                     int Height = rd.Next(50, this.Height);  
  31.                     this.CreateGraphics().DrawEllipse(new Pen(Brushes.Red, 1), new Rectangle(Width, Height, 100, 100));  
  32.                     Thread.Sleep(100);  
  33.                 }  
  34.   
  35.   
  36.             }) { IsBackground = true };  
  37.             th.Start();  
  38.         }  
  39.         Random rd;  
  40.         private void Form1_Load(object sender, EventArgs e)  
  41.         {  
  42.             rd = new Random();  
  43.   
  44.         }  
  45.   
  46.         private void btnTh2_Click(object sender, EventArgs e)  
  47.         {  
  48.   
  49.             Thread th = new Thread(t =>  
  50.             {  
  51.   
  52.                 for (int i = 0; i <= 100; i++)  
  53.                 {  
  54.                     int Width = rd.Next(0, this.Width);  
  55.                     int Height = rd.Next(50, this.Height);  
  56.                     this.CreateGraphics().DrawEllipse(new Pen(Brushes.Blue, 1), new Rectangle(Width, Height, 100, 100));  
  57.                     Thread.Sleep(100);  
  58.                 }  
  59.   
  60.   
  61.             }) { IsBackground = true };  
  62.             th.Start();  
  63.         }  
  64.   
  65.         private void btnTh3_Click(object sender, EventArgs e)  
  66.         {  
  67.               
  68.             Thread th = new Thread(t =>  
  69.             {  
  70.   
  71.                 for (int i = 0; i <= 100; i++)  
  72.                 {  
  73.                     int Width = rd.Next(0, this.Width);  
  74.                     int Height = rd.Next(50, this.Height);  
  75.                     this.CreateGraphics().DrawEllipse(new Pen(Brushes.Green, 1), new Rectangle(Width, Height, 100, 100));  
  76.                     Thread.Sleep(100);  
  77.                 }  
  78.   
  79.   
  80.             }) { IsBackground = true };  
  81.             th.Start();  
  82.         }  
  83.     }  
  84.   
  85. }  
Step 3:- Run the Application and see the output, given below:



Description

In this example, I created three buttons to create and manage new threads with the different color structure, with an example to show an eclipse graph inside the form on the individual thread start.