public CpAVConnection_OhNet(OpenHome.Net.ControlPoint.CpDevice _rendererDevice)
{
avTransport = new OpenHome.Net.ControlPoint.Proxies.CpProxyUpnpOrgAVTransport1(_rendererDevice);
avTransport.SetPropertyInitialEvent(propertyChanged);
avTransport.SetPropertyChanged(propertyChanged);
avTransport.SetPropertyLastChangeChanged(propertyChanged);
avTransport.Subscribe();
}