.NET Core 2.0 is available today as a final release. You can start developing with it at the command line or in Visual Studio 2017 15.3.
https://blogs.msdn.microsoft.com/dotnet/2017/08/14/announcing-net-core-2-0/
Azure Functions Support. We added the tools for developing C# Azure Functions to the “Azure development” workload. The main feature change is that this update enables you to create pre-compiled C# Azure Functions, which start faster than script-based functions. For details see the Visual Studio 2017 Tools for Azure Functions blog post.
https://blogs.msdn.microsoft.com/webdev/2017/05/10/azure-function-tools-for-visual-studio-2017/