ZeroInstall.DesktopIntegration.SyncIntegrationManager.HandleDownloadedAppList C# (CSharp) Method

        private void HandleDownloadedAppList(SyncResetMode resetMode, [NotNull] byte[] appListData)
        {
            if (appListData.Length == 0) return;

            AppList serverList;
            try
            {
                serverList = AppList.LoadXmlZip(new MemoryStream(appListData), _cryptoKey);
            }
                #region Error handling
            catch (ZipException ex)
            {
                // Wrap exception to add context information
                if (ex.Message == "Invalid password") throw new InvalidDataException(Resources.SyncCryptoKeyInvalid);
                throw new InvalidDataException(Resources.SyncServerDataDamaged, ex);
            }
            #endregion

            Handler.CancellationToken.ThrowIfCancellationRequested();
            try
            {
                MergeData(serverList, resetClient: (resetMode == SyncResetMode.Client));
            }
            catch (KeyNotFoundException ex)
            {
                // Wrap exception since only certain exception types are allowed
                throw new InvalidDataException(ex.Message, ex);
            }
            finally
            {
                Finish();
            }

            Handler.CancellationToken.ThrowIfCancellationRequested();
        }