private static Interop.PushClient.VoidStateChangedCallback stateDelegate = null;
private static Interop.PushClient.VoidNotifyCallback notifyDelegate = null;
private static Interop.PushClient.VoidResultCallback registerResult = null;
private static Interop.PushClient.VoidResultCallback unregisterResult = null;
private static Interop.PushClient.VoidStateChangedCallback stateDelegate = null;
private static Interop.PushClient.VoidNotifyCallback notifyDelegate = null;
private static Interop.PushClient.VoidResultCallback registerResult = null;
private static Interop.PushClient.VoidResultCallback unregisterResult = null;