C# -> App.config no puedo modificarlo desde el programa :S

[Ralstlin]

Change values as XML file


public void editConfig(string key, string value)
{
XmlDocument Config = new XmlDocument();
string path = "Here your .Config File path";
Config.Load(path);

XmlNodeList apps = Config.GetElementsByTagName("appSettings");
XmlNodeList list = ((XmlElement)apps[0]).GetElementsByTagName("add");
foreach (XmlElement nodo in list)
{
if (nodo.GetAttribute("key") == key)
{
nodo.SetAttribute("value",value);
break;
}
}
Config.Save(path);
}