Print the image in A4 size pape from picturebox

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C#

I hav Tried this , But when i print the image in A4 size paper it cut half image .
please give me solution that image should feet in A4 size paper:

What I have tried:

I hav Tried this , But when i print the image in A4 size paper it cut half image .
please give me solution that image should feet in A4 size paper:

private void button1_Click(object sender, EventArgs e)
{
PrintDialog pd = new PrintDialog();
PrintDocument doc = new PrintDocument();
doc.PrintPage += Doc_PrintPage;
pd.Document = doc;
if (pd.ShowDialog() == DialogResult.OK)
doc.Print();

}

private void Doc_PrintPage(object sender, PrintPageEventArgs e)
{

Bitmap bm = new Bitmap(pictureBox1.Width,pictureBox1.Height);
pictureBox1.DrawToBitmap(bm, new Rectangle(0, 0, pictureBox1.Width, pictureBox1.Height));
e.Graphics.DrawImage(bm,0,0);
bm.Dispose();
}