Mostrar imagen en un MessageBox

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Código:

private void button1_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                MessageBox.Show("You must enter a name.", "Name Entry Error",
                   MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            }
            else
            {
                // Code to act on the data entered would go here.
            }

        }