How to create a random pixel image (Mosaic) in CSharp using Visual Studio

In this project we will be creating a random pixels image in C# using Microsoft Visual Studio. By the end of this project we will have a mosaic of random colors. You are encouraged to experiment with the code and generate different mosaic as per your imagination. Have fun coding.

Form1.cs

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

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

        private void Form1_Load(object sender, EventArgs e)
        {
            int width = 640, height = 320;

            //bitmap
            Bitmap bmp = new Bitmap(width, height);

            //random number
            Random rand = new Random();

            //create random pixels
            for (int y = 0; y < height; y++)
            {
                for (int x = 0; x < width; x++)
                {
                    //generate random ARGB value
                    int a = rand.Next(256);
                    int r = rand.Next(256);
                    int g = rand.Next(256);
                    int b = rand.Next(256);

                    //set ARGB value
                    bmp.SetPixel(x, y, Color.FromArgb(a, r, g, b));
                }
            }

            //load bmp in picturebox1
            pictureBox1.Image = bmp;

            //save (write) random pixel image
            bmp.Save("D:\\Image\\RandomImage.png");
        }
    }
}

Form1.Designer.cs

namespace RandomPixelImage
{
    partial class Form1
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.pictureBox1 = new System.Windows.Forms.PictureBox();
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
            this.SuspendLayout();
            // 
            // pictureBox1
            // 
            this.pictureBox1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.pictureBox1.Location = new System.Drawing.Point(0, 0);
            this.pictureBox1.Name = "pictureBox1";
            this.pictureBox1.Size = new System.Drawing.Size(381, 327);
            this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
            this.pictureBox1.TabIndex = 0;
            this.pictureBox1.TabStop = false;
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(381, 327);
            this.Controls.Add(this.pictureBox1);
            this.Name = "Form1";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "Random Pixel Image";
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.PictureBox pictureBox1;
    }
}