C# is rapidly approaching its third decade of life. Originally released in 2000, the language has grown and changed across 7 major versions. Once a knock off of Java in all but name has jumped out ahead on many aspects. 

Today we're thrilled to announce the release of ASP.NET Core 2.1.0! This is the latest release of our open-source and cross-platform web framework for .NET and it's now ready for production use. 

Issues Fixed in this Release
Xamarin app throws Cannot access a disposed object. Object name: 'MobileAuthenticatedStream'error.
Xamarin.Android app throws ClassNotFoundException when deriving from Application class.
Upgrading may cause previously installed Windows and Android SDKs to be uninstalled.
Bumped JDK 8 to the latest version to avoid download failures from Oracle website.
 

These are the customer-reported issues addressed in 15.7.1:

• This release includes a fix that reduces memory usage and GC pressure during solution load.

Microsoft Security Advisory for .NET Core Denial Of Service Vulnerability

CVE-2018-0765

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET Core and .NET native version 2.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

Microsoft is aware of a denial of service vulnerability that exists when .NET Framework and .NET Core improperly process XML documents. An attacker who successfully exploited this vulnerability could cause a denial of service against a .NET Framework, .NET Core, or .NET native application.

The update addresses the vulnerability by correcting how .NET Framework, .NET Core, and .NET native applications handle XML document processing.

If your application is an ASP.NET Core application, developers are also advised to update to ASP.NET Core 2.0.8. 

Blazor United prototype
A quick look at some of the experiments we're considering for Blazor in .NET 8 

What's the big deal with IAsyncEnumerable<T> in .NET Core 3.0? 

[HttpGet]
public IAsyncEnumerable<Product> Get()
    => productsRepository.GetAllProducts();

In .NET 8, we’re investing in improving the debugging experience of commonly used types in .NET apps. These include:

• HttpContext and friends
• WebApplication
• MVC and Razor Pages
• gRPC
• Endpoint metadata
• Logging
• Configuration 

We are actively monitoring the 1.0 release for issues to include in a first patch (1.0.1) release of the .NET Core SDK. There is no scheduled date for this patch update but early August is likely.  

What's new in this release?

• Full C#7.0 support
• .NET Core support

Changes to Nullable Reference Type Annotations in .NET 6.0