I still have a lot of user working with Mobile device and compact Framework 3.5
to windows 10 on my laptop I was happy to find that everything was still working fine

So I upgrade my other machine to Windows 10

But suddenly after update 10586 The former Compact Framework 3.5 was removed without any warning !
It mean that I'm totally unable to support my customer

This is absolutely unacceptable from Microsoft !
And those kind of things will me surely drives me to move to Android instead staying with Microsoft for any mobile application

Here is another victim !

Microsoft.CompactFramework.CSharp.targets missing after Update 10586 of Windows 10 - static void Main() Dev Blog