private void dgv_auth_DoubleClick(object sender, EventArgs e)
 {
     current_login_id = Convert.ToInt32(dgv_auth.Rows[FunctionsClass.GetCurrentRowIndex(dgv_auth)].Cells["login_id"].Value.ToString());
     this.Close();
 }
 private void dgv_contacts_DoubleClick(object sender, EventArgs e)
 {
     selectedContactId = Convert.ToInt32(dgv_contacts.Rows[FunctionsClass.GetCurrentRowIndex(dgv_contacts)].Cells["contact_id"].Value.ToString());
     this.Close();
 }