change connection string & reload app.config at run time

when i change connection string through this code it not reload app.config at runtime how we reload app config

config.ConnectionStrings.ConnectionStrings["JVVNL_NEW.Properties.Settings.JVVNL_NEWConnectionString1"].ConnectionString = ConString;
config.ConnectionStrings.ConnectionStrings["CMS_NEW.Properties.Settings.JVVNL_NEWConnectionString1"].ConnectionString = ConString;

config.Save(ConfigurationSaveMode.Modified,true);
ConfigurationManager.RefreshSection(config.ConnectionStrings.SectionInformation.SectionName);

From stackoverflow

• IIRC, the ConfigurationManager.RefreshSection requires a string parameter specifying the name of the Section to refresh :

  ConfigurationManager.RefreshSection("connectionStrings");
  

  I think that the ASP.NET application should automatically reload when the ConnectionStrings element is modified and the configuration does not need to be manually reloaded.

• Yeah, when ASP.NET web.config gets updated, the whole application gets restarted which means the web.config gets reloaded.

• You can also refresh the configuration in it's entirety:

  ConnectionStringSettings importToConnectionString = currentConfiguration.ConnectionStrings.ConnectionStrings[newName];
  
  if (importToConnectionString == null)
  {
      importToConnectionString = new ConnectionStringSettings();
      importToConnectionString.ConnectionString = importFromConnectionString.ConnectionString;
      importToConnectionString.ProviderName = importFromConnectionString.ProviderName;
      importToConnectionString.Name = newName;
      currentConfiguration.ConnectionStrings.ConnectionStrings.Add(importToConnectionString);
  }
  else
  {
      importToConnectionString.ConnectionString = importFromConnectionString.ConnectionString;
      importToConnectionString.ProviderName = importFromConnectionString.ProviderName;
  }
  
  Properties.Settings.Default.Reload();
  

  robnardo : Hi Neil, could you maybe expand on your answer? I am a noob. How do I set currentConfiguration and importFromConnectionString ?