Firebase Push Notifications Integration (Setup) in C# MVC

I'm looking to implement Firebase Push Notifications in my C# MVC application. The goal is to broadcast notifications to all users, triggered by various events such as promotional offers, updates, and user actions.

Key Requirements:
- Set up Firebase Push Notifications
- Code the integration in C# MVC
- Ensure notifications can be triggered by:
- Promotional offers or discounts
- Updates or announcements
- User activity or actions
- Schedule: Notifications to be sent out monthly

Ideal Skills:
- Proficient in C# and MVC framework
- Experienced with Firebase and push notifications
- Strong understanding of event-driven programming
- Able to implement a user-friendly notification system