Grayscale Scale

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

        private void Form1_Load(object sender, EventArgs e)
        {
            //read image
            Bitmap bmp = new Bitmap("D:\\Image\\Taj.jpg");

            //load original image in picturebox1
            pictureBox1.Image = Image.FromFile("D:\\Image\\Taj.jpg");

            //get image dimension
            int width = bmp.Width;
            int height = bmp.Height;

            //color of pixel
            Color p;

            //grayscale
            for (int y = 0; y < height; y++)
            {
                for (int x = 0; x < width; x++)
                {
                    //get pixel value
                    p = bmp.GetPixel(x, y);

                    //extract pixel component ARGB
                    int a = p.A;
                    int r = p.R;
                    int g = p.G;
                    int b = p.B;

                    //find average
                    int avg = (r + g + b) / 3;

                    //set new pixel value
                    bmp.SetPixel(x, y, Color.FromArgb(a, avg, avg, avg));
                }
            }

            //load grayscale image in picturebox2
            pictureBox2.Image = bmp;

            //write the grayscale image
            bmp.Save("D:\\Image\\Grayscale.png");
        }
    }
}

namespace Grayscale
{
    partial class Form1
    {

        private System.ComponentModel.IContainer components = null;

        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        private void InitializeComponent()
        {
            this.pictureBox1 = new System.Windows.Forms.PictureBox();
            this.pictureBox2 = new System.Windows.Forms.PictureBox();
            this.label1 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox2)).BeginInit();
            this.SuspendLayout();

            this.pictureBox1.Location = new System.Drawing.Point(12, 12);
            this.pictureBox1.Name = "pictureBox1";
            this.pictureBox1.Size = new System.Drawing.Size(285, 300);
            this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
            this.pictureBox1.TabIndex = 0;
            this.pictureBox1.TabStop = false;

            this.pictureBox2.Location = new System.Drawing.Point(327, 12);
            this.pictureBox2.Name = "pictureBox2";
            this.pictureBox2.Size = new System.Drawing.Size(285, 300);
            this.pictureBox2.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
            this.pictureBox2.TabIndex = 1;
            this.pictureBox2.TabStop = false;

            this.label1.AutoSize = true;
            this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 14.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label1.Location = new System.Drawing.Point(108, 330);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(75, 24);
            this.label1.TabIndex = 2;
            this.label1.Text = "Original";

            this.label2.AutoSize = true;
            this.label2.Font = new System.Drawing.Font("Microsoft Sans Serif", 14.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label2.Location = new System.Drawing.Point(431, 330);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(93, 24);
            this.label2.TabIndex = 3;
            this.label2.Text = "Grayscale";

            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(624, 363);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.pictureBox2);
            this.Controls.Add(this.pictureBox1);
            this.Name = "Form1";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "Grayscale";
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox2)).EndInit();
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.PictureBox pictureBox1;
        private System.Windows.Forms.PictureBox pictureBox2;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Label label2;
    }
}