private void OpenFileDialog_FileOk(object sender, CancelEventArgs e)
{
bendings = ExportXml.ReadXml(openFileDialog1.FileName);
DrawBendingGroup(bendings);
}
private void SaveFileDialog_FileOk(object sender, CancelEventArgs e)
{
ExportXml.GenerateXml(bendings, saveFileDialog1.FileName);
}