/// <summary>
        /// Initializes the singleton instance of the command.
        /// </summary>
        /// <param name="package">Owner package, not null.</param>
        public static async Task InitializeAsync(AsyncPackage package, DTE2 dte)
        {
            // Switch to the main thread - the call to AddCommand in AbpCodeGenerationCommand's constructor requires
            // the UI thread.
            await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync(package.DisposalToken);

            _dte = dte;
            OleMenuCommandService commandService = await package.GetServiceAsync(typeof(IMenuCommandService)) as OleMenuCommandService;

            Instance = new AbpCodeGenerationCommand(package, commandService);
        }
        /// <summary>
        /// Initialization of the package; this method is called right after the package is sited, so this is the place
        /// where you can put all the initialization code that rely on services provided by VisualStudio.
        /// </summary>
        /// <param name="cancellationToken">A cancellation token to monitor for initialization cancellation, which can occur when VS is shutting down.</param>
        /// <param name="progress">A provider for progress updates.</param>
        /// <returns>A task representing the async work of package initialization, or an already completed task if there is none. Do not return null from this method.</returns>
        protected override async Task InitializeAsync(CancellationToken cancellationToken, IProgress <ServiceProgressData> progress)
        {
            // When initialized asynchronously, the current thread may be a background thread at this point.
            // Do any initialization that requires the UI thread after switching to the UI thread.

            await this.JoinableTaskFactory.SwitchToMainThreadAsync(cancellationToken);

            DTE2 dte = (DTE2) await GetServiceAsync(typeof(DTE));

            await AbpCodeGenerationCommand.InitializeAsync(this, dte);

            await base.InitializeAsync(cancellationToken, progress);
        }