Value Types vs Reference Types, Struct vs Class, and Boxing & Unboxing — The Complete C# Guide

📰 Dev.to · Libin Tom Baby

Learn the differences between value and reference types in C#, and how to avoid performance traps with structs, classes, boxing, and unboxing

intermediate Published 30 Mar 2026
Action Steps
  1. Declare a variable using a value type to understand how it is stored on the stack
  2. Create a class and a struct to compare their behavior as reference and value types
  3. Use the 'is' keyword to check the type of an object and avoid boxing
  4. Implement a simple example to demonstrate the performance impact of boxing and unboxing
  5. Apply the knowledge of value and reference types to optimize code and avoid common performance traps
Who Needs to Know This

Software engineers and developers working with C# will benefit from understanding the nuances of value and reference types to write more efficient code

Key Insight

💡 Value types are stored on the stack, while reference types are stored on the heap, and understanding the difference is crucial for optimizing C# code

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Master C# value and reference types to boost performance!

Key Takeaways

Learn the differences between value and reference types in C#, and how to avoid performance traps with structs, classes, boxing, and unboxing

Full Article

Value/reference types, stack vs heap, struct vs class, boxing/unboxing performance traps ...
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