An Online Personal Assistant project using ASP.NET would involve developing a web-based application that can assist users with various tasks, such as scheduling, email management, and task management. The application could be designed to integrate with other services, such as calendar applications and email providers, to provide a comprehensive personal assistant experience.

Some of the key features that an Online Personal Assistant project may include are:

1. Task Management: This feature allows users to create and manage tasks, set reminders, and track progress.
2. Calendar Integration: The application should be able to integrate with calendar applications such as Google Calendar or Outlook, to allow users to schedule and manage appointments and events.
3. Email Management: The application should provide the ability to manage email, including the ability to read, compose, and reply to emails, and to organize and archive emails.
4. Contact Management: The application should provide the ability to manage contacts, including the ability to create, edit, and delete contacts, and to organize and search contacts.
5. Speech Recognition: The application should have the ability to listen to users’ voice commands and execute tasks accordingly.
6. Natural Language Processing: The application should have the ability to understand natural language commands and queries, to provide a more user-friendly experience.
7. Reminder Management: The application should provide the ability to set and manage reminders, including the ability to set reminders for appointments, tasks, and other events.
8. User-friendly interface: The application should have a user-friendly interface that makes it easy for users to navigate and find the information they need quickly.
9. Third-party Integration: The application should provide the ability to integrate with other services, such as social media, news, weather, etc.
10. Security: The application should provide the necessary security measures to ensure the protection of user’s information and data.

Programming Language:

• Front End: ASP.NET
• Back End: SQL Server