This is a sample on how to consume project creation, open and publish events in Trados Studio

ProjectNotificationSample.cs

using System;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using NotificationsSample.EventAggregator;
using Newtonsoft.Json;
using Sdl.Desktop.IntegrationApi;
using Sdl.Desktop.IntegrationApi.Extensions;
using Sdl.Desktop.IntegrationApi.Interfaces;
using Sdl.ProjectAutomation.FileBased.Events;
using Sdl.TranslationStudioAutomation.IntegrationApi;

namespace NotificationsSample.EventAggregator
{
    [ViewPart(
        Id = "MyProjectNotificationsViewPart",
        Name = "Project Notifications",
        Description = "Project Notifications")]
    [ViewPartLayout(Dock = DockType.Bottom, LocationByType = typeof(ProjectsController))]
    class NotificationSampleViewPart : AbstractViewPartController
    {
        protected override Control GetContentControl()
        {
            return _control.Value;
        }

        protected override void Initialize()
        {
            //Obtain the event aggregator instance from Trados Studio which will facilitate
            //event registration
            IStudioEventAggregator ea = SdlTradosStudio.Application.GetService<IStudioEventAggregator>();

            //Event registration is just one line of code and it requires 2 pieces of information
            //the event to register which is specified in the GetEvent method and
            //the susbcribe method which expects a method that will be called 
            //when the specified event is triggered
            
            ea.GetEvent<ProjectCreatedEvent>().Subscribe(ShowInfo);
            ea.GetEvent<ProjectOpenedEvent>().Subscribe(ShowInfo);
            ea.GetEvent<ProjectPublishedEvent>().Subscribe(ShowInfo);
        }

        private void ShowInfo(object eventData)
        {
            string json = JsonConvert.SerializeObject(eventData, Formatting.Indented);
            StringBuilder info = new StringBuilder();
            info.Append(Environment.NewLine);
            
            //Cast the method argument to ProjectEvent type which is the base class
            //for project events. This exposed the ProjectInfor property which will provide
            //details about the project for which the event was generated
            ProjectEvent projectEvent = eventData as ProjectEvent;

            if(projectEvent == null) return;

            if (projectEvent is ProjectCreatedEvent)
            {
                info.AppendLine("Project " + project.ProjectInfo.Name + " created");
            }

            if (projectEvent is ProjectOpenedEvent)
            {
                info.AppendLine("Project " + project.ProjectInfo.Name + " opened");
            }

            if (projectEvent is ProjectPublishedEvent)
            {
                info.AppendLine("Project " + project.ProjectInfo.Name + " published");
            }

            _control.Value.UpdateText2(info);
        }

        private static readonly Lazy<NotificationSampleViewPartControl> _control = new Lazy<NotificationSampleViewPartControl>(() => new NotificationSampleViewPartControl());
    }
}