The New Inline Arrays of C# 12 Are Awesome, But…

Summary

C# 12 introduces inline arrays as a feature primarily for internal .NET use to improve performance by allowing stack allocation for fixed-size buffers. While developers won't typically create them directly, they will consume them as Microsoft integrates them, offering benefits similar to C's fixed-size buffers and enabling more efficient interfacing with unmanaged APIs. The practical takeaway is reduced memory allocation and improved performance, especially in high-performance scenarios and when interacting with external interfaces.