Event Systems (Grade A)Security-tested data-ai skill for Claude AI. Grade A. Event system patterns — C# events, UnityEvent, SO event channels, static EventBus. When to use each, zero-allocation patterns, memory leak prevent

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Reviewed by Daniel Nikulshyn·Updated July 2026

Overview

Event system patterns are discussed, including C# events, UnityEvent, SO event channels, and static EventBus. Each is evaluated for coupling, configuration, allocation, and best use cases. C# events are preferred for internal class communication and code-to-code interactions. They allow for zero-allocation and have good performance. However, they require manual subscription and unsubscription to prevent memory leaks. UnityEvent is used when designers need to configure responses without code. It is suitable for button clicks, animation events, trigger zones, and cutscene triggers. However, it is slower than C# events and harder to debug. SO event channels are used for cross-system communication and provide a more decoupled and designer-configurable approach. However, they require asset creation and management. Static EventBus is used for truly global events and provides a global event bus. It should be used sparingly due to its potential for tight coupling and performance issues. The importance of always unsubscribing from events when objects are deactivated or destroyed is emphasized to prevent memory leaks.

Key features

C# events for code-only communication
UnityEvent for designer-configurable responses
SO Event Channels for cross-system communication
Static EventBus for global events
Zero-allocation patterns
Memory leak prevention strategies

Pricing

Model: Free
Category: Skills
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Use cases

Health System Notifications

Using C# events to notify multiple systems about health changes or death.

Designer-Configurable Interactions

Employing UnityEvent for designers to configure responses to button clicks or other interactions without coding.

Cross-System Communication

Utilizing SO Event Channels for decoupled communication between different systems or managers.

Pros & Cons

Pros

Decouples systems for more flexible and modular code
Supports various event types for different use cases
Helps prevent memory leaks with proper unsubscribe patterns
Enables designer-configurable events through UnityEvent

Cons

UnityEvents are slower and harder to debug than C# events
Overuse of global EventBus can lead to tightly coupled systems
Requires careful management of subscriptions to prevent memory leaks

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Q&A

How can I prevent memory leaks when using these event patterns?

Always unsubscribe from C# events and UnityEvents when objects are destroyed or no longer needed. For static EventBus or SO channels, implement explicit unregister methods or use weak references to ensure listeners are cleaned up, preventing dangling references.

Asked by Tatiana Popescu · Jul 9, 2025

What are the main advantages of SO event channels?

SO event channels allow cross‑system communication with a more decoupled, designer‑configurable approach. They work well for shared data flow across systems, but require asset management and careful setup to avoid over‑complexity.

Asked by Tariq Aziz · Jul 5, 2025

When should I use C# events instead of UnityEvent?

Use C# events for internal class communication and code-to-code interactions where you need zero allocation, high performance, and tighter control. They are ideal when you can manage subscriptions manually and want to avoid the slower, debug‑heavier UnityEvent.

Asked by Mireille Dupont · Jun 28, 2025

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