Advanced Data Structures in C# (Part 2): Queues and HashSets for Unity & Game Dev

Welcome to Part 2 of our Advanced Data Structures in C# for Unity Game Development series! In this video, we continue our deep dive by exploring two powerful and essential C# collections: Queues and HashSets. These structures help you manage game logic more efficiently, maintain data integrity, and perform complex operations with ease — perfect for Unity games and high-performance applications. Queues in C# – First In, First Out (FIFO): Queues are perfect for processing data in the exact order it arrives. Ideal for managing player turns, task scheduling, or server request handling. Declaration and Initialization Example: Queue string activePlayers = new Queue string(); Core Methods Enqueue: Adds an item to the end Dequeue: Removes and returns the first item Peek: Views the first item without removing it Game Use Cases Managing turn-based logic Handling NPC actions in order Real-time task/event queues HashSets in C# – Unique Element Collection: HashSets are collections that automatically prevent duplicate entries, making them perfect for ensuring data integrity and fast lookups. Key Features Ensures uniqueness Provides fast add, remove, and lookup operations Useful for membership checking and data validation Practical Applications Avoiding duplicate pickups Managing unique player states or actions Tracking visited nodes or locations Set Operations with HashSets: Learn powerful set-based methods for managing data relationships: UnionWith: Combines two sets, keeping only unique elements IntersectWith: Keeps only items found in both sets ExceptWith: Removes all elements found in another set Game Use Cases Combining multiple player groups Filtering banned users from active lists Matching player attributes across systems Why These Data Structures Matter: Stacks handle reverse-order logic (covered in Part 1) Queues process items in arrival order HashSets ensure uniqueness and enable advanced set operations Together, they provide essential tools for crafting dynamic, scalable, and efficient game logic. By the end of this video, you’ll learn: How to use Queues and HashSets effectively How to apply these structures in Unity How to use set operations for filtering and merging data Best practices for data integrity and efficient game state management Don’t forget to Like, Subscribe, and hit the 🔔 to stay updated with our next drop in the series!