.NET 6: Date and Time Structures 

Work in progress to add support for covariant return types to the .NET runtime. Soon we'll be able to override a virtual method returning `object` with a method returning `string`. Because of how array variance works, weird things might be possible in IL. 

class Base
{
    public virtual IntPtr[] Fun() => null;
}

// This is obvious pseude-code because C# won't let us introduce methods differing
// in return type. C# also requires to be explicit about "virtual" and "override".
// But IL... not so much.
class Derived : Base
{
    // overrides Base.Fun on 32bit platforms.
    public override uint[] Fun() => null;

    // overrides Base.Fun on 64bit platforms.
    public override ulong[] Fun() => null;
}

.NET 6 Release Candidate 1 (RC1) is now available and includes many great new improvements to ASP.NET Core. 

C#6: Using Static Types and Extension Methods

There are various techniques that could be implemented to achieve asynchronous interactions among microservices. In this article, I shall talk about a use case where we would be using a message broker – RabbitMQ – and “Fanout” technique to implement the asynchronous messaging pattern in action. 

If you're migrating an app to .NET 6, the breaking changes listed here might affect you. Changes are grouped by technology area, such as ASP.NET Core or Windows Forms. 

What's new in this release?

• Full C#7.0 support
• .NET Core support

Firefox 74 is the first browser version that drops support for TLS 1.0 and TLS 1.1. It will no longer establish connections to web sites that use these outdated standards.