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## Obsoleting DatabaseErrorPage With the introduction of [extensible handlers for `DeveloperExceptionPage`](https://github.com/dotnet/aspnetcore/issues/8536), we are planning to obsolete the `DatabaseErrorPageMiddleware` and its associated extension methods in .NET 5.0 with further plans to...

Announcement
Breaking change
5.0.0
Documented

**NOTE:** Please use the existing discussion issue for any questions/comments: https://github.com/dotnet/aspnetcore/issues/19570 ## Removal of Microsoft.* Azure Integration Packages As a follow-up to https://github.com/aspnet/Announcements/issues/408, the `Microsoft.*` packages that provide integration between...

Breaking change
5.0.0
Documented

*Please use https://github.com/dotnet/aspnetcore/issues/25215 to discuss this change* ## Removed RazorTemplateEngine API The `RazorTemplateEngine` API was removed in favor of `RazorProjectEngine`. ### Version introduced 3.0 ### Old behavior A template engine...

Announcement
Breaking change
3.0.0
Documented

## Changes to appendQueryString in IIS UrlRewrite middleware We are fixing a bug in the IIS UrlRewrite middleware which will append query strings by default instead of removing them. This...

Announcement
Breaking change
5.0.0
Documented

# Microsoft Security Advisory CVE-2020-1597 | ASP.NET Core Denial of Service Vulnerability ## Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core....

Security

## Obsoleting Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv and Libuv packages Earlier versions of ASP.NET Core used libuv as an implementation detail of how asynchronous IO was performed. In ASP.NET Core 2.0, an alternative transport...

Announcement
Breaking change
5.0.0
Documented

## Debugging Blazor WASM apps in VS Code no longer requires installing JavaScript Debugger Nightly extension As of the June release of VS Code, the JavaScript debugger is bundled into...

Announcement
Documented

## System.IdentityModel packages updated to 6.6.0 (6.7.1 in preview 8) We have updated the following packages to 6.6.0 (6.7.1 in preview 8) `Microsoft.IdentityModel.Logging` `Microsoft.IdentityModel.ProtocolsOpenIdConnect` `Microsoft.IdentityModel.ProtocolsWsFederation` `System.IdentityModel.Tokens.Jwt` ### Version introduced 5.0.0-preview7...

Announcement
Breaking change
5.0.0
Documented

Please use https://github.com/dotnet/aspnetcore/issues/19570 for any discussions on this announcement. ASP.NET Core currently includes three packages designed to integrate our components with Azure services. Specifically, the following three packages: * [`Microsoft.Extensions.Configuration.AzureKeyVault`](https://www.nuget.org/packages/Microsoft.Extensions.Configuration.AzureKeyVault/),...

Announcement
5.0.0

## Authorization resource in endpoint routing will now be HttpContext Prior to this change, when using endpoint routing, the resource used for authorization would be the endpoint. This was insufficient...

Announcement
Breaking change
5.0.0
Documented