protected void SendReleaseResponse()
{
if (State != DicomAssociationState.Sta8_AwaitingAReleaseRPLocalUser) {}
var pdu = new AReleaseRP();
EnqueuePdu(pdu.Write());
State = DicomAssociationState.Sta13_AwaitingTransportConnectionClose;
if (AssociationReleased != null)
AssociationReleased(_assoc);
}