Microsoft.Protocols.TestTools.StackSdk.RemoteDesktop.Rdpbcgr.RdpbcgrServerSessionContext.GetPacketFromBuffer C# (CSharp) Method

        public StackPacket GetPacketFromBuffer(bool onlySVCPacket = false)
        {
            if (unprocessedPacketBuffer.Count > 0)
            {
                lock (unprocessedPacketBuffer)
                {
                    if (unprocessedPacketBuffer.Count > 0)
                    {
                        if (onlySVCPacket)
                        {
                            for (int i = 0; i < unprocessedPacketBuffer.Count; i++)
                            {
                                if (unprocessedPacketBuffer[i] is Virtual_Channel_RAW_Pdu
                                        || unprocessedPacketBuffer[i] is ErrorPdu
                                        || unprocessedPacketBuffer[i] is MCS_Disconnect_Provider_Ultimatum_Pdu)
                                {
                                    // if the packet is ErrorPdu or MCS_Disconnect_Provider_Ultimatum_Pdu, there's some error in the connection
                                    // should return this two types of PDU, so as to notify the error
                                    StackPacket pdu = unprocessedPacketBuffer[i];
                                    unprocessedPacketBuffer.RemoveAt(i);
                                    return pdu;
                                }
                            }
                        }
                        else
                        {
                            StackPacket pdu = unprocessedPacketBuffer[0];
                            unprocessedPacketBuffer.RemoveAt(0);
                            return pdu;
                        }
                    }

                }
            }
            return null;
        }