Solid

Something like this (ex WeSay):

public static bool [[MigrateConfigurationXmlIfNeeded]](XPathDocument configurationDoc, string targetPath)
     {
            Logger.WriteEvent("Checking if migration of configuration is needed.");

if (configurationDoc.CreateNavigator().SelectSingleNode("configuration") == null)
{
                Logger.WriteEvent("Migrating Configuration File from version 0 to 1.");

//ResourceManager mgr = new System.Resources.ResourceManager(typeof(WeSay.Project.WeSayWordsProject));

using (Stream stream = Assembly.GetExecutingAssembly().GetManifestResourceStream(typeof(WeSayWordsProject),
                                                                          "MigrateConfig0To1.xsl"))
{
                    [[XslCompiledTransform]] transform = new [[XslCompiledTransform]]();
                    using (XmlReader reader = [[XmlReader]].Create(stream))
    {
                        transform.Load(reader);
                        string tempPath = Path.GetTempFileName();
                        using (XmlWriter writer = [[XmlWriter]].Create(tempPath))
        {
                            transform.Transform(configurationDoc, writer);
                            transform.TemporaryFiles.Delete();
                            writer.Close();
                        }
                        string s = targetPath + ".tmp";
                        if (File.Exists(s))
        {
                            File.Delete(s);
                        }
                        File.Move(targetPath, s);
                        File.Move(tempPath, targetPath);
                        File.Delete(s);
                        return true;
                    }
                }
            }
            return false;
        }