# .NET native tools 2.2 (UWP 6.2.x) Release Notes

You can see what was included in each .NET Native 2.2 ([Microsoft.NETCore.UniversalWindowsPlatform 6.2.x](https://www.nuget.org/packages/Microsoft.NETCore.UniversalWindowsPlatform)) release below.

When using Visual Studio, these packages require Visual Studio 2019 or Visual Studio 2017 Version 15.9.

### UWP 6.2.9 (August 23rd, 2019)

- Reduce optimizer maximum thread count for Store compilations to increase ingestion reliability
- Fix issue in the analysis engine related to unsafe patterns that could lead to NullReferenceException (https://github.com/dotnet/core/issues/2614)
- Fix gatekeeper errors due to bad System.Private.Uri AssemblyVersion
- Fix "Invalid IL" warning from some unsafe code patterns
- Fix type system issue regarding parameter constraints on methods (https://github.com/SixLabors/ImageSharp/issues/828)
- Fix interop compilation failure for gRPC Authentication package (https://github.com/grpc/grpc/issues/18188)
- Fix intop code generation failure for System.IO.ISoreafeItemHandleAccess.Create (https://developercommunity.visualstudio.com/content/problem/310750/release-compile-fails-due-to-errors-in-mcg-generat.html)
- Adjust garbage collection timing during interop to eliminate memory increase in UWP app when navigating between pages
- Fix issue leading to Access Violation in the garbage collector caused by ARM32 volatile registers not being populated correctly
- Fix reference assemblies for WCF so they have the expected public key (https://github.com/dotnet/wcf/issues/3743)
- Fix issue causing Visual Studio 2017 hangs during debugging sessions

### UWP 6.2.8 (March 13th, 2019)
- Fixes package publishing issues

### UWP 6.2.7 (March 12th, 2019)
- Adds support for ARM64
- Improved performance for debugging scenarios (F5)
- Addresses top customer issues with 6.1 and 6.2 Preview.
- Addresses some issues when used with ReactiveUI 4.1. It is still recommended that projects wishing to use this package add ShortcutGenericAnalysis flag set to true to the projects.
- Fix metadata reader issue leading to build failure when using Microsoft.ML.Net (https://github.com/XamlBrewer/UWP-MachineLearning-Sample/pull/1#issuecomment-469988557)
- Fix crashes during resouce loading for some locales (https://developercommunity.visualstudio.com/content/problem/386760/net-native-22-uwp-project-build-fail.html)
- Fix crashes caused by improper escaping for application assets with spaces in path (https://github.com/Microsoft/dotnet/issues/930)
- Add PackageConflictPreferredPackages property to avoid build breaks with certain package graphs
- Fix issues related to Store upload failures (Error 1201)
- Fix for a domain spoofing vulnerability which causes the meaning of a URI to change when International Domain Name encoding is applied. An attacker who successfully exploited the vulnerability could redirect a URI. (https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0657)


### UWP 6.2.0-preview1-26926-04 Preview (October 2nd, 2018) 
These are preview bits in advance of the release in November 2018 available in Visual Studio 15.9 Preview 3
- Improved performance for debugging scenarios (F5)
- Addresses bugs when used with React Framework 4.1 

### UWP 6.2.0-preview1-26831-02 Preview (September 11th, 2018) 
These are preview bits in advance of the release in November 2018 available in Visual Studio 15.9 Preview 2
- Integrates support for ARM64 into the Visual Studio tooling experience
- Addresses top cusomter issues with 6.1 and 6.2 Preview.

### UWP 6.2.0-Preview1-26502-02 Preview (May 7th, 2018) 
These are preview bits in advance of the release at the end of 2018
- Adds support for ARM64