public IAsyncResult BeginGetRequest(PhysicalAddress destination, DCP.BlockOptions option)
{
Trace.WriteLine("Sending Get " + option.ToString() + " request", null);
MemoryStream mem = new MemoryStream();
//ethernet
Ethernet.Encode(mem, destination, adapter.MacAddress, Ethernet.Type.VLanTaggedFrame);
//VLAN
VLAN.Encode(mem, VLAN.Priorities.Priority0, VLAN.Type.PN);
//Profinet Real Time
RT.EncodeFrameId(mem, RT.FrameIds.DCP_Get_Set_PDU);
//Profinet DCP
UInt16 xid = ++lastXid;
DCP.EncodeGetRequest(mem, xid, option);
//start Async
return(new ProfinetAsyncDcpResult(this, mem, xid));
}