Difference Between 'const' and 'readonly' in C# — The Definitive, Practical Guide
📰 Dev.to · Libin Tom Baby
Learn the difference between 'const' and 'readonly' in C# to write more effective code
Action Steps
- Define a constant using 'const' to store a value that never changes
- Use 'readonly' to declare a variable that can be initialized only once
- Compare the IL behavior of 'const' and 'readonly' to understand compilation differences
- Evaluate performance notes to determine when to use each keyword
- Apply 'const' and 'readonly' in real-world scenarios to improve code quality
Who Needs to Know This
Software engineers and developers who work with C# will benefit from understanding the difference between 'const' and 'readonly' to make informed decisions in their code
Key Insight
💡 'const' is compile-time evaluated, while 'readonly' is runtime evaluated, affecting how and when to use each
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💡 Know when to use 'const' vs 'readonly' in C# to improve your code
Key Takeaways
Learn the difference between 'const' and 'readonly' in C# to write more effective code
Full Article
Learn the difference between const and readonly in C#. Includes definitions, IL behavior, performance notes, and real-world scenarios to choose the right one.
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