Hi. your question isn't obvious. do you perform saving operation ?
if you use saveFileDialog.Create a button and try this:
private void GetPathButton_Click(object sender, RoutedEventArgs e)
{
string filePath = "";
SaveFileDialog saveFileDialog = new SaveFileDialog();
bool? result = saveFileDialog.ShowDialog();
if (result.Value)
{
filePath = saveFileDialog.FileName;
string fileName = saveFileDialog.SafeFileName;
}
}