protected override async Task
OnMessageActivityAsync(ITurnContext<IMessageActivity> turnContext,
CancellationToken cancellationToken)
    {
        await turnContext.SendActivityAsync(MessageFactory.Text($"Echo:
                                Opening app1..."), cancellationToken);

        var startInfo = new ProcessStartInfo
        {
            FileName = @"D:_Projectsxyzapp1.exe",
            UseShellExecute = false,
            CreateNoWindow = false,
        };

        var process = Process.Start(startInfo);
        var success = process != null && process.WaitForExit(30 * 10000);

        if (!success)
        {
            //process?.Kill();
            throw new ApplicationException("A timeout occurred during
                 method execution. The service interface did not finish in a
                        timely fashion.");
        }
        var exitCode = process.ExitCode;
    }