Picture In TextBox

private void Form1_Load(object sender, EventArgs e)
{
    PictureBox pic = new PictureBox();
    //pic.Image = Image.FromFile("FilePath");
    pic.Image = SystemIcons.Information.ToBitmap();;
    textBox1.Controls.Add(pic);
}

Persial Calender

using System.Globalization;

public string Miladi2Shamsi(DateTime _date)
{
    PersianCalendar pc = new PersianCalendar();
    StringBuilder sb = new StringBuilder();
    sb.Append(pc.GetYear(_date).ToString("0000"));
    sb.Append("/");
    sb.Append(pc.GetMonth(_date).ToString("00"));
    sb.Append("/");
    sb.Append(pc.GetDayOfMonth(_date).ToString("00"));
    return sb.ToString();
}

string today = Miladi2Shamsi(DateTime.Now);

Painting Chart

private void numericUpDown1_ValueChanged(object sender, EventArgs e)
        {
            int a, b, c, d = 0;
            a = int.Parse(numericUpDown1.Value.ToString());
            b = a * 3600;
            c = b / 1000;
            d = 50;
            SolidBrush sb = new SolidBrush(Color.Black);
            Bitmap bit = new Bitmap(Width, Height);
            Graphics g = Graphics.FromImage(bit);
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
            g.DrawPie(new Pen(sb, 1), d, 20, 190, 170, 0, 360);
            sb.Color = Color.Silver;
            g.FillPie(sb, d, 20, 190, 170, 0, 360);
            sb.Color = Color.Black;
            g.DrawPie(new Pen(sb, 1), d, 20, 190, 170, -c, c);
            sb.Color = Color.Yellow;
            g.FillPie(sb, d, 20, 190, 170, -c, c);
            this.BackgroundImage = bit;

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            numericUpDown1_ValueChanged(null, null);
        }

Make Bitmap On Startup 2

using System.Drawing;

void New_file(PictureBox pb)
{
bmp_image = newBitmap(pb.Width, pb.Height);
g = Graphics.FromImage(bmp_image);
g.FillRectangle(Brushes.White, newRectangle(0, 0, bmp_image.Width, bmp_image.Height));
pb.Image = bmp_image;
}

Make Bitmap On Startup

private Image CreateBitmap()
{
    System.Drawing.Bitmap flag = new System.Drawing.Bitmap(10, 10);
    for (int x = 0; x < flag.Height; ++x)
        for (int y = 0; y < flag.Width; ++y)
            flag.SetPixel(x, y, Color.White);
    for (int x = 0; x < flag.Height; ++x)
        flag.SetPixel(x, x, Color.Red);
    return flag;
}

private void Form1_Load(object sender, EventArgs e)
{
    pictureBox1.Image = CreateBitmap();
}