“The .NET Core and ASP.NET Core workload is no longer in preview. We have fixed several bugs and improved usability of .NET Core and ASP.NET Core Tooling.
Team Explorer connect experience is now improved to make it easier to find the projects and repos to which you want to connect.
The Advanced Save option is back due to popular demand.
Multiple installation-related issues are now fixed in this update, including hangs. We've also added a retry button when installation fails, disambiguated Visual Studio installs in the Start menu, and added support for creating a layout for offline install.”
The official release notes provide a detailed summary of all the other changes and fixes.
In the newest version of Visual Studio 2017 Release Candidate, Microsoft has temporarily removed Data Science and Python Development workloads, but promises to bring those components soon as separate downloads. According to John Montgomery, Director of Program Management for Visual Studio, they “weren't going to meet all the release requirements.”
Nested extensions should now work fine in Visual Studio 2017, but users still report problems with XAML syntax highlighting. Unni Ravindanathan from Microsoft says that they “have been trying to reproduce this for a while without luck.”
A workaround to get it going anyways is to open XAML files as XML, or as a user points out by running the following command:
C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\Common7\IDE> .\devenv /Setup
Visual Studio 2017 Release Candidate build 26127.00 can be downloaded here. As Microsoft is still fixing and improving things, they are still asking for user feedback via the Report a Problem option which can be found in the upper right corner, either from the installer or the Visual Studio IDE.