Altering App.Config in C# Application

[cnixuser]

Hi,

I am wondering if someone could post a snippet of sample code showing how to edit a pre-existing entry in the App.config file.

[Plater]

Define edit?
Something like this?
http://geekswithblogs.net/akraus1/articles/64871.aspx

[cnixuser]

Define edit?
Something like this?
http://geekswithblogs.net/akraus1/articles/64871.aspx

Thanks, this snippet from the link you provided was very helpful:

lease note that the System.Configuration.ConfigurationManager returns only objects with read only properties. Subsequent calls to GetSection use the cached instance inside the ConfigurationManager. This constraint requires you to create every time a new instance of you e.g. EditorFontData object if you want to write to the App.config file. You even cannot add an object with the same name twice to the System.Configuration.Configuration object. Now comes the fun part: To edit an existing App.config file you have to remove your config object and then add a new object instance to the Configuration object. Only then the Save will succeed.

EditorFontData configData = new EditorFontData();
 
                configData.Name = "Arial";
 
                configData.Size = 20;
 
                configData.Style = 2;
 
 
 
                // Write the new configuration data to the XML file
 
                Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
 
                config.Sections.Remove("EditorSettings");
 
                config.Sections.Add("EditorSettings", configData);
 
                config.Save();