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;
  11. namespace ThreadApplication
  12. {
  13. public partial class Form1 : Form
  14. {
  15. public Form1()
  16. {
  17. InitializeComponent();
  18. }
  20. private void btnTh1_Click(object sender, EventArgs e)
  21. {
  24. Thread th = new Thread(t =>
  25. {
  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. }
  36. }) { IsBackground = true };
  37. th.Start();
  38. }
  39. Random rd;
  40. private void Form1_Load(object sender, EventArgs e)
  41. {
  42. rd = new Random();
  44. }
  46. private void btnTh2_Click(object sender, EventArgs e)
  47. {
  49. Thread th = new Thread(t =>
  50. {
  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. }
  61. }) { IsBackground = true };
  62. th.Start();
  63. }
  65. private void btnTh3_Click(object sender, EventArgs e)
  66. {
  68. Thread th = new Thread(t =>
  69. {
  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. }
  80. }) { IsBackground = true };
  81. th.Start();
  82. }
  83. }
  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.