protected override void Run()
        {
            base.Run();

            var session = Connection.Session;

            var url = session.Url;
            Uri uri = new Uri(url);

            var appFolder = Path.Combine(m_applianceDirectory, m_applianceFileName);
            var appFile = string.Format("{0}.ovf", m_applianceFileName);

            if (!Directory.Exists(appFolder))
                Directory.CreateDirectory(appFolder);
            PercentComplete = 5;

            Description = Messages.EXPORTING_VMS;
            EnvelopeType env;
            try
            {
                m_transportAction = new XenOvfTransport.Export(uri, session)
                                        {
                                            UpdateHandler = UpdateHandler,
                                            ShouldVerifyDisks = m_shouldVerify,
                                            Cancel = Cancelling //in case the Cancel button has already been pressed
                                        };
                m_transportAction.SetTvmNetwork(m_networkUuid, m_isTvmIpStatic, m_tvmIpAddress, m_tvmSubnetMask, m_tvmGateway);
                env = (m_transportAction as XenOvfTransport.Export).Process(appFolder, m_applianceFileName, (from VM vm in m_vmsToExport select vm.uuid).ToArray());
                PercentComplete = 60;
            }
            catch (OperationCanceledException)
            {
                throw new CancelledException();
            }

            foreach (var eula in m_eulas)
            {
                if (Cancelling)
                    throw new CancelledException();
                Description = Messages.ADDING_EULAS;
                OVF.AddEula(env, eula);
            }

            if (Cancelling)
                throw new CancelledException();

            var ovfPath = Path.Combine(appFolder, appFile);
            Description = String.Format(Messages.CREATING_FILE, appFile);
            OVF.SaveAs(env, ovfPath);
            PercentComplete = 70;

            if (Cancelling)
                    throw new CancelledException();

            if (m_signAppliance)
            {
                Description = Messages.SIGNING_APPLIANCE;
                OVF.Sign(m_certificate, appFolder, appFile);
            }
            else if (m_createManifest)
            {
                Description = Messages.CREATING_MANIFEST;
                OVF.Manifest(appFolder, appFile);
            }

            PercentComplete = 90;

            if (Cancelling)
                    throw new CancelledException();

            if (m_createOVA)
            {
                Description = String.Format(Messages.CREATING_FILE, String.Format("{0}.ova", m_applianceFileName));
                OVF.ConvertOVFtoOVA(appFolder, appFile, m_compressOVFfiles);
            }
            else if (m_compressOVFfiles)
            {
                Description = Messages.COMPRESSING_FILES;
                m_compressor = new OvfCompressor { CancelCompression = Cancelling }; //in case the Cancel button has already been pressed}

                try
                {
                    m_compressor.CompressOvfFiles(ovfPath, "GZip");
                }
                catch (OperationCanceledException)
                {
                    throw new CancelledException();
                }
            }

            PercentComplete = 100;
            Description = Messages.COMPLETED;
        }