Three months ago, Microsoft released the very first preview for .NET core 2.0. Now it has reached its final release making it an improved platform for developers.
.NET Core 2.0 adds Linux binary archives, the runtime package store, separates portable and standalone executables, and removes the need for OpenSSL on OSX. Furthermore, there are portable binary archives for all platforms, support for Linux Arm builds, and Windows Arm32 and Arm64 builds.
Also, Visual Studio 2017 version 15.3 was released today and Visual Studio for Mac version 7.1 to add support for .NET Core 2.0. You can read all the details on the .NET and Visual Studio blogs.