What is the Mixed Reality Toolkit? | One Dev Question

Kevin Semple introduces the Mixed Reality Toolkit, which is a Microsoft driven, open-source project that accelerates Mixed Reality app development. For an introduction to Mixed Reality see: 

https://docs.microsoft.com/learn/modules/introduction-dynamics-365/5-mixed-reality?WT.mc_id=onedevquestion-c9-MR2. 

For more information, visit Introduction to Mixed Reality Development.