PLAIN TEXT
C#:
  1. var config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
  2. var connectionStringSettings =
  3. new ConnectionStringSettings("ConnectionString", _arguments["connectionString"], "System.Data.SqlClient");
  4. config.ConnectionStrings.ConnectionStrings.Add(connectionStringSettings);
  5. config.Save(ConfigurationSaveMode.Modified);
  6. ConfigurationManager.RefreshSection("connectionStrings");