: These assemblies are converted into standard C++ code.

The IL2CppDLL.dll is primarily recognized as a target or output file in tools like Il2CppInspector , which facilitates several advanced features: Windows Player: IL2CPP build files - Unity - Manual

: A native platform compiler (like Visual Studio for Windows) compiles this C++ code.

: Managed assemblies (.NET DLLs) are compiled from your C# scripts.