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:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace ThreadApplication
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnTh1_Click(object sender, EventArgs e)
        {


            Thread th = new Thread(t =>
            {

                for (int i = 0; i <= 100; i++)
                {
                    int Width = rd.Next(0, this.Width);
                    int Height = rd.Next(50, this.Height);
                    this.CreateGraphics().DrawEllipse(new Pen(Brushes.Red, 1), new Rectangle(Width, Height, 100, 100));
                    Thread.Sleep(100);
                }


            }) { IsBackground = true };
            th.Start();
        }
        Random rd;
        private void Form1_Load(object sender, EventArgs e)
        {
            rd = new Random();

        }

        private void btnTh2_Click(object sender, EventArgs e)
        {

            Thread th = new Thread(t =>
            {

                for (int i = 0; i <= 100; i++)
                {
                    int Width = rd.Next(0, this.Width);
                    int Height = rd.Next(50, this.Height);
                    this.CreateGraphics().DrawEllipse(new Pen(Brushes.Blue, 1), new Rectangle(Width, Height, 100, 100));
                    Thread.Sleep(100);
                }


            }) { IsBackground = true };
            th.Start();
        }

        private void btnTh3_Click(object sender, EventArgs e)
        {

            Thread th = new Thread(t =>
            {

                for (int i = 0; i <= 100; i++)
                {
                    int Width = rd.Next(0, this.Width);
                    int Height = rd.Next(50, this.Height);
                    this.CreateGraphics().DrawEllipse(new Pen(Brushes.Green, 1), new Rectangle(Width, Height, 100, 100));
                    Thread.Sleep(100);
                }


            }) { IsBackground = true };
            th.Start();
        }
    }

}

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.