<OperationContractAttribute(Action="http://opcfoundation.org/UA/2008/02/Services.wsdl/CreateSubscription", 
   ReplyAction="http://opcfoundation.org/UA/2008/02/Services.wsdl/CreateSubscriptionResponse", 
   AsyncPattern=True)>
<FaultContractAttribute(DetailType=Opc.Ua.ServiceFault, 
   Action="http://opcfoundation.org/UA/2008/02/Services.wsdl/CreateSubscriptionFault", 
   Name="ServiceFault", 
   Namespace="http://opcfoundation.org/UA/2008/02/Types.xsd", 
   ProtectionLevel=ProtectionLevel.None, 
   HasProtectionLevel=False)>
Function BeginCreateSubscription( _
   ByVal request As CreateSubscriptionMessage, _
   ByVal callback As AsyncCallback, _
   ByVal asyncState As Object _
) As IAsyncResult

[OperationContractAttribute(Action="http://opcfoundation.org/UA/2008/02/Services.wsdl/CreateSubscription", 
   ReplyAction="http://opcfoundation.org/UA/2008/02/Services.wsdl/CreateSubscriptionResponse", 
   AsyncPattern=true)]
[FaultContractAttribute(DetailType=Opc.Ua.ServiceFault, 
   Action="http://opcfoundation.org/UA/2008/02/Services.wsdl/CreateSubscriptionFault", 
   Name="ServiceFault", 
   Namespace="http://opcfoundation.org/UA/2008/02/Types.xsd", 
   ProtectionLevel=ProtectionLevel.None, 
   HasProtectionLevel=false)]
IAsyncResult BeginCreateSubscription( 
   CreateSubscriptionMessage request,
   AsyncCallback callback,
   object asyncState
)