private void button8_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Title = "Select files";
openFileDialog.Filter = "All files(*xml*)|*.xml*";
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
string fileName = openFileDialog.FileName;
OrderService.ConvertToHTMLAndOpen(fileName);
}
}