Question

My question is regarding the AppConfig file. Basically I know how to retrieve the keys and values, but the question here is how can I delete the key and values or modify the values on a runtime?

<appSettings>
  <add key="key1" value="value1" />
  <add key="key2" value="value2" />
  <add key="key3" value="value3" />
</appSettings>

So what if I want to modify:

And I want to have key1 with value set to Test so that I have <add key="key1" value="Test" />

And what if I want to delete;

Let presume I want to delete key3 to remove it from appSettings,

Any help would be welcome.

Answer 1

You can use something like this:

 m_Configuration = System.Configuration.ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
 m_Configuration.AppSettings.Settings.Remove(key);
 m_Configuration.AppSettings.Settings.Add(key, value);
 m_Configuration.Save(ConfigurationSaveMode.Modified);