Issues Fixed in 15.9.18

• May allow mitigation of a Per-Monitor awareness related crash in Visual Studio

Security Advisory Notices

• Git for Visual Studio Remote Excecution Vulnerability due to too lax restrictions on submodule names
• Git for Visual Studio Remote Excecution Vulnerability due to incorrect quoting of command-line arguments
• Git for Visual Studio Arbitrary File Overwrite Vulnerability due to usage of non-letter drive names during clone
• Git for Visual Studio Remote Excecution Vulnerability due to unawareness of NTFS Alternate Data Streams
• Git for Visual Studio Arbitrary File Overwrite Vulnerability due to not refusing to write out tracked files containing backslashes
• Git for Visual Studio Remote Execution Vulnerability due to too lax validation of submodule names in recursive clones

• Xamarin fastlane: "There was an error while syncing the developer information: 'Limit of requests to iTunes Connect is reached.'"
• MSIX Package Project with WPF App - Create App Packages no longer works.  

• Improved support for .NET Core 3.1 

Installing Visual Studio 2019 16.4 will also install .NET Core 3.1 Preview 3, so you don’t need to separately install it. For Blazor development with .NET Core 3.1, Visual Studio 2019 16.4 is required. 

Go Live

This release is supported in production and you can call Microsoft support with issues. 

• Edit Continue Crashes IDE
• Link.exe exited with code - 1073741819 when generating map files.
• ClickOnce installer prerequisite vcredist 14 (x64) is invalid after download
• Every time I hit a breakpoint and apply changes with edit & continue Visual Studio crashes to desktop
• Fixed crash when editing code while debugging ASP.NET applications.

• Added support for Xcode 11.2
• 'TypeConverter cannot convert from System.String' after upgrade to Visual Studio 2019.
• Fixed an issue where loading existing extensions (.design dll) in UWP crashes Visual Studio. 

Here’s what’s new in this release for ASP.NET Core:

• New component tag helper
• Prevent default actions for events in Blazor apps
• Stop event propagation in Blazor apps
• Validation of nested models in Blazor forms
• Detailed errors during Blazor app development 

Please see the SQL Server Management Studio release notes for a comprehensive list of bug fixes. 

The biggest improvement in this release is support for C++/CLI (AKA “managed C++”). The changes for C++/CLI are primarily in Visual Studio.