private void btn_newdoc_Click(object sender, EventArgs e)
        {
            frm_create_doc create_doc = new frm_create_doc();

            create_doc.Show();
            this.Close();
        }
 private void btn_newdoc_Click(object sender, EventArgs e)
 {
     frm_create_doc create_doc = new frm_create_doc();
     create_doc.Show();
     this.Close();
 }