[PART14.High-level language features (2/5)] C# reflection — How to survive Unity IL2CPP

We will cover how reflection APIs such as typeof, GetType, and MethodInfo.Invoke work at the IL level, why they fall into the code stripping trap in Unity IL2CPP builds, and how they are replaced by the Source Generator these days. Covered in this video: • typeof vs GetType vs Type.GetType — Crucial differences at the IL level • Real-world performance cost of reflection and MethodInfo.CreateDelegate caching pattern • How to navigate to private members with BindingFlags and IL2CPP code stripping pitfalls ⏱️ Table of Contents 00:00 Intro 00:21 1. Raising a problem — What if you have to deal with an unknown type at compile time? 02:21 2. Concept definition — What is reflection 03:45 3. Internal operation — Three ways to obtain a Type object 06:02 4. Practical application — When to use reflection 11:54 5. Pitfalls and precautions 14:56 6. Changes by C# version 16:49 7. Summary 📝 Blog post (more detailed code and IL analysis) → https://everyday-devup.tistory.com/413 📌 What is this channel? A series of in-depth C# concepts for Unity mobile game client developers. The pitfalls and patterns that new developers encounter in practice are explained along with IL analysis. 💬 Please leave any questions or feedback in the comments! #CSharp #Unity #Game Development #Unity #Reflection #Reflection #IL2CPP #Programming #csharp