Net中的运行时配置(特别是EntLib)

Configuration cfg = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
ConnectionStringSettings connection = new ConnectionStringSettings();
connection.Name = "Runtime Connection";
connection.ProviderName = "System.Data.OleDb";
connection.ConnectionString = "myconstring";
cfg.ConnectionStrings.ConnectionStrings.Add(connection);
cfg.Save(ConfigurationSaveMode.Modified);

ConfigurationManager.RefreshSection("connectionStrings");
var runtimeCon = DatabaseFactory.CreateDatabase("Runtime Connection");

虽然它给了我想要的,但它永久地编辑了应用程序配置. 当然,我可以回去删除更改,但我不想经历这种麻烦。