NuGet.VisualStudio.VsPackageInstallerEvents.NotifyInstalled C# (CSharp) Method

        internal void NotifyInstalled(PackageOperationEventArgs e)
        {
            if (PackageInstalled != null)
            {
                PackageInstalled(new VsPackageMetadata(e.Package, e.InstallPath));
            }
        }

        /// <summary>
        /// Runs the specified action and rolls back any installed packages if on failure.
        /// </summary>
        private void RunSolutionAction(Action action)
        {
            var packagesAdded = new List <IPackage>();

            EventHandler <PackageOperationEventArgs> installHandler = (sender, e) =>
            {
                // Record packages that we are installing so that if one fails, we can rollback
                packagesAdded.Add(e.Package);
                _packageEvents.NotifyInstalling(e);
            };

            EventHandler <PackageOperationEventArgs> installedHandler = (sender, e) =>
            {
                _packageEvents.NotifyInstalled(e);
            };

            PackageInstalling += installHandler;
            PackageInstalled  += installedHandler;

            try
            {
                // Execute the action
                action();
            }
            catch
            {
                if (packagesAdded.Any())
                {
                    // Only print the rollback warning if we have something to rollback
                    Logger.Log(MessageLevel.Warning, VsResources.Warning_RollingBack);
                }

                // Don't log anything during the rollback
                Logger = null;

                // Rollback the install if it fails
                Uninstall(packagesAdded);
                throw;
            }
            finally
            {
                // Remove the event handler
                PackageInstalling -= installHandler;
                PackageInstalled  -= installedHandler;
            }
        }