Retrieving annotated method from attribute constructor

public class ErrorHandler
{
  [HandleMessage(ErrorHandling.ERROR)]
  private static void OnError(string message, object context, params object[] args)
  {
    Exception e;
    args.Extract(out e);

    Console.WriteLine(e.Message + Environment.NewLine + e.StackTrace);
  }
}

public static void RegisterStaticHandlers(Type type)
{
  foreach (var mInfo in type.GetMethods(BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Static))
  {
    var mAttr = mInfo.GetCustomAttribute<HandleMessageAttribute>();
    if (mAttr != null)
      RegisterInstanceHandler(mAttr.Message, mInfo.CreateDelegate<MessageHandler>());
  }
}

public class HandleMessageAttribute : Attribute
{
  public string Message { get; private set; }

  public HandleMessageAttribute(string message)
  {
    Message = message;

    Messages.RegisterInstanceHandler(message, ... method reference here ...);
  }
}

static ErrorHandler()
{
  Messages.RegisterStaticHandlers(typeof(ErrorHandler));
}