using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Drawing.Drawing2D;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

​

namespace WindowsFormsApp13

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

​

        private void Form1_Load(object sender, EventArgs e)

        {

            Image img = GetImage();

            pictureBox1.Image = img;

        }

​

        Image GetImage()

        {

            Bitmap bmp = new Bitmap(400, 300);

            Graphics g = Graphics.FromImage(bmp);

​

            Pen p = new Pen(Color.Red, 3);

            g.DrawRectangle(p, 10, 10, 20, 20);

​

            g.SmoothingMode = SmoothingMode.AntiAlias;

            g.DrawEllipse(Pens.Blue, 40, 10, 20, 20);

​

            g.FillRectangle(Brushes.Brown, 70, 10, 20, 20);

​

            Brush b = new LinearGradientBrush(new Point(40, 40), new Point(90, 90), Color.Red, Color.Blue);

            g.FillRectangle(b, 40, 40, 50, 50);

​

            int x = 70, y = 10, width = 20, height = 20;

​

            g.ScaleTransform(0.5f, 0.5f);

            g.FillRectangle(Brushes.Tomato, x, y, width, height);

            g.ResetTransform();

​

            g.RotateTransform(45f);

            g.FillRectangle(Brushes.Tomato, x, y, width, height);

            g.ResetTransform();

​

            g.TranslateTransform(x + width / 2, y + height / 2);

            g.ScaleTransform(0.5f, 0.5f);

            g.RotateTransform(45f);

            g.FillRectangle(Brushes.Tomato, -width / 2, -height / 2, width, height);

            g.ResetTransform();

​

            g.DrawLine(Pens.Black, new Point(30, 30), new Point(100, 100));

​

​

            var path = new GraphicsPath();

            path.AddLines(new Point[]

            {

                new Point(10, 10),

                new Point(20, 20),

                new Point(30, 60),

                new Point(10, 100)

            });

​

            g.DrawPath(Pens.Green, path);

​

            g.FillPath(Brushes.Green, path);

            return bmp;

        }

    }

}

​