public override void Marshal(DataOutputStream dos)
        {
            base.Marshal(dos);
            if (dos != null)
            {
                try
                {
                    dos.WriteUnsignedByte((byte)this._requiredReliabilityService);
                    dos.WriteUnsignedShort((ushort)this._pad1);
                    dos.WriteUnsignedByte((byte)this._pad2);
                    dos.WriteUnsignedInt((uint)this._requestID);
                    dos.WriteUnsignedInt((uint)this._actionID);
                    dos.WriteUnsignedInt((uint)this._fixedDatumRecords.Count);
                    dos.WriteUnsignedInt((uint)this._variableDatumRecords.Count);

                    for (int idx = 0; idx < this._fixedDatumRecords.Count; idx++)
                    {
                        FixedDatum aFixedDatum = (FixedDatum)this._fixedDatumRecords[idx];
                        aFixedDatum.Marshal(dos);
                    }

                    for (int idx = 0; idx < this._variableDatumRecords.Count; idx++)
                    {
                        VariableDatum aVariableDatum = (VariableDatum)this._variableDatumRecords[idx];
                        aVariableDatum.Marshal(dos);
                    }
                }
                catch (Exception e)
                {
                    if (PduBase.TraceExceptions)
                    {
                        Trace.WriteLine(e);
                        Trace.Flush();
                    }

                    this.RaiseExceptionOccured(e);

                    if (PduBase.ThrowExceptions)
                    {
                        throw e;
                    }
                }
            }
        }
        public override void Marshal(DataOutputStream dos)
        {
            base.Marshal(dos);
            if (dos != null)
            {
                try
                {
                    dos.WriteUnsignedInt((uint)this._requestID);
                    dos.WriteUnsignedInt((uint)this._timeInterval);
                    dos.WriteUnsignedInt((uint)this._fixedDatums.Count);
                    dos.WriteUnsignedInt((uint)this._variableDatums.Count);

                    for (int idx = 0; idx < this._fixedDatums.Count; idx++)
                    {
                        FixedDatum aFixedDatum = (FixedDatum)this._fixedDatums[idx];
                        aFixedDatum.Marshal(dos);
                    }

                    for (int idx = 0; idx < this._variableDatums.Count; idx++)
                    {
                        VariableDatum aVariableDatum = (VariableDatum)this._variableDatums[idx];
                        aVariableDatum.Marshal(dos);
                    }
                }
                catch (Exception e)
                {
                    if (PduBase.TraceExceptions)
                    {
                        Trace.WriteLine(e);
                        Trace.Flush();
                    }

                    this.RaiseExceptionOccured(e);

                    if (PduBase.ThrowExceptions)
                    {
                        throw e;
                    }
                }
            }
        }