Question

What is a good way to edit a Web.config file programmatically?

I looked into System.Xml but couldn’t find any obvious answers.

Answer 1

This fellow shows sample code if you still want to do it after all the caveats:

protected void EditConfigButton(object sender, EventArgs e) {    Configuration objConfig = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration('~');    AppSettingsSection objAppsettings = (AppSettingsSection)objConfig.GetSection('appSettings');    //Edit    if (objAppsettings != null)    {       objAppsettings.Settings['test'].Value = 'newvalueFromCode';       objConfig.Save();    } } 

One valid reason for editing a web.config is to encrypt it, which is what that article is about.