We now share a lot of code between the runtimes, it is an effort that we have taken seriously to improve compatibility, and capabilities. Today, when you check

We now share a lot of code between the runtimes, it is an effort that we have taken seriously to improve compatibility, and capabilities. Today, when you checkout the Mono source code, it brings CoreRT and CoreFX. From a user perpective, we have worked to make a universal API surface that goes everywhere Mono, .NET or Xamarin go, it is called the .NET Standard, and last month we released a major upgrade to .NET standard that grew the API surface across the board. As for the runtimes, they have different pros/cons so they currently can not be unified into a single one, so we need to maintain different ones, but we are working to make the tooling work better across the board.