Попробуйте:
/* Usage
* using(AppConfig.Change("my.config")) {
* // do something...
* }
*/
public abstract class AppConfig : IDisposable
{
public static AppConfig Change(string path)
{
return new ChangeAppConfig(path);
}
public abstract void Dispose();
private class ChangeAppConfig : AppConfig
{
private bool disposedValue = false;
private string oldConfig = Conversions.ToString(AppDomain.CurrentDomain.GetData("APP_CONFIG_FILE"));
public ChangeAppConfig(string path)
{
AppDomain.CurrentDomain.SetData("APP_CONFIG_FILE", path);
typeof(ConfigurationManager).GetField("s_initState", BindingFlags.NonPublic | BindingFlags.Static).SetValue(null, 0);
}
public override void Dispose()
{
if (!this.disposedValue)
{
AppDomain.CurrentDomain.SetData("APP_CONFIG_FILE", this.oldConfig);
typeof(ConfigurationManager).GetField("s_initState", BindingFlags.NonPublic | BindingFlags.Static).SetValue(null, 0);
this.disposedValue = true;
}
GC.SuppressFinalize(this);
}
}
}