&gt; Disclaimer: I work at Microsoft, where we&#x27;re using XAML to build the Windows Shell.<p>This is off-topic, but I have a question about the Windows 10 shell. You previously said that the new XAML-based part of the shell is written in C++&#x2F;CX. Why not C#? Is the performance and&#x2F;or memory footprint of the .NET Framework still not good enough, even with .NET Native?