Binary write to adress

Umm it doesnt work:

 private void button1_Click(object sender, EventArgs e)
        {
            BinaryWriter wr = new BinaryWriter(File.OpenWrite(listBox1.SelectedItem.ToString()));
           
            for (int i = 0x83C410; i <= 0x83C417; i++)
            {
                 
                wr.Write(textBox1.Text);
            }
            wr.Close();
          
        }