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c# - Reload configuration settings from an external config file during run-time

I'm writing a game server in C# and would like to reload or refresh settings from a config file while the server is running.

Ideally I would like to save the settings in an XML file, have the ability to edit the file while the game server is running and then send the server the command to reload the settings from the file.

I know I can use a database to do this as well, but the game server is fairly small and I think it would be more practical to just save settings in a flat-file. I will have file-level access to the machine the server will run on.

What should I use?

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Use http://msdn.microsoft.com/en-us/library/system.configuration.configurationmanager.aspx

Use a Custom Configuration Section, hookup the sections from the app.config to external config file(s) by setting the location attrib of the section. All xml loading and serialization is done by those custom classes

Code provided by CarelZA:

First of all, ConfigurationManager caches the application's configuration by config section, and you can call ConfigurationManager.RefreshSection() to invalidate the cache for a specific section.

In app.config I added:

<configSections>
  <section name="gameSettings" 
           type="System.Configuration.NameValueSectionHandler,system , Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, Custom=null"/>
</configSections>
<gameSettings configSource="game.config"/>

I created a file called "game.config" and set "Copy to Output Directory" to "Copy always".

In game.config:

<gameSettings>
  <add key="SettingName" value="SettingValue" />
</gameSettings>

Then in code, in order to access any setting:

settings = (NameValueCollection) ConfigurationManager.GetSection("gameSettings");
return settings["SettingName"];

And to reload the game config at any time when the reload command is sent to the server:

ConfigurationManager.RefreshSection("gameSettings");

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