Code:
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace Crtanje
{
    public class MainForm : Form
    {
        public MainForm()
        {
            this.Paint += new System.Windows.Forms.PaintEventHandler(this.MainFormPaint);
        }
        
        void MainFormPaint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(20, 80, 14, 40),
                                                               Color.LightGreen, Color.Yellow, 35);
            g.FillRectangle(brush, new Rectangle(10, 10, 150, 100));
            
            g.DrawLine(new Pen(Color.Red), new Point(30, 160), new Point(94, 58));
            
            Font f = new Font("Tahoma", 40);
            LinearGradientBrush brush2 = new LinearGradientBrush(new Rectangle(20, 80, 14, 40),
                                                               Color.Red, Color.LightSkyBlue, 35);
            g.DrawString("Crtanje", f, brush2, 50, 50);
        }
        
        [STAThread]
        public static void Main(string[] args)
        {
            Application.Run(new MainForm());
        }        
    }
}