Microsoft has done something that might surprise a bunch of people out there, it has open sourced the WSL (Windows Subsystem for Linux) to make it easier for Windows users to run Linux distributions. The WSL sample that is now open source allows distro maintainers to build WSL packages for the Microsoft Store and to create custom Linux distro

Source: Hot Hardware – Microsoft Releases Windows 10 Open Source Tool To Bring More Linux Distros To Platform