✅ how to call a function from another window WPF

private void Upload(object sender, RoutedEventArgs e)
        {
            try
            {
                int dsCode = Convert.ToInt32(Name_txt.Text);
                byte[] images = null;
                FileStream stream = new FileStream(imglocation,FileMode.Open,FileAccess.Read);
                BinaryReader brs = new BinaryReader(stream);
                images = brs.ReadBytes((int)stream.Length);
                SqlCommand insertCMD = new SqlCommand("insert into DesignTB(DesignCode,DesignIMG) values(@dsCode,@images)");
                insertCMD.Parameters.AddWithValue("@dsCode",dsCode);
                insertCMD.Parameters.AddWithValue("@images",images);
                int row = dBAccess.executeQuery(insertCMD);
                if (row == 1)
                {
                    ManageStock manageStock = new ManageStock();
                    manageStock.LoadList();
                    Close();
                }
            }
            catch (Exception)
            {
                MessageBox.Show("Unsuccessful");
            }
        }
    }
}

public void LoadList() {
            string query = "select * from DesignTB";
            dBAccess.readDatathroughAdapter(query, dt);
            lstBox.ItemsSource = dt.DefaultView;
            dBAccess.closeConn();
        }