Category: ASP.NET Core

Roundup #47: Elastic APM, Miguel de Icaza, Microsoft.FeatureManagement, .NET Core 3 Progress

Derek Comartin Leave a comment

Here are the things that caught my eye recently in .NET.  I’d love to hear what you found most interesting this week.  Let me know in the comments or on Twitter.

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Elastic APM .NET Agent beta Released

We are proud to announce the beta release of the Elastic APM .NET agent! The version number of this release is 1.0.0-beta1.

Back in February we announced the alpha release of the .NET APM agent. We received very positive feedback from the community, and we managed to attract lots of users already in this very early stage. Our base NuGet package reached around 20,000 downloads.

Link: https://www.elastic.co/blog/elastic-apm-dot-net-agent-beta-released

Careers Behind the Code: Building Careers and Companies with Open Source with Miguel de Icaza

In this episode, we talk to Miguel de Icaza, Distinguished Engineer about his career building open source software, founding companies, and building communities.

https://www.youtube.com/watch?v=ApLBy0AJBEw

Link: https://www.youtube.com/watch?v=ApLBy0AJBEw

Microsoft.FeatureManagement

In a recent .NET Community Standup, a new library was introduced that’s being built by the Azure team – Microsoft.FeatureManagement. In this post, I give a brief introduction to the library and how to use it in an ASP.NET Core app. This post just covers the basics – in later posts I’ll show some of the ASP.NET Core-specific features, as well as how to create custom feature filters.

Link: https://andrewlock.net/introducing-the-microsoft-featuremanagement-library-adding-feature-flags-to-an-asp-net-core-app-part-1/

.NET Core 3.0 Progress

Link: https://twitter.com/ziki_cz/status/1146553003610202112

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Roundup #43: .NET 5, gRPC, .NET Core 3 Perf, App Service Dashboard, Interface Default Implementation

Derek Comartin Leave a comment

I was away while Microsoft BUILD happened last week. After catching up, here are the things that caught my eye this week in .NET.  I’d love to hear what you found most interesting this week.  Let me know in the comments or on Twitter.

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Introducing .NET 5

Today, we’re announcing that the next release after .NET Core 3.0 will be .NET 5. This will be the next big release in the .NET family.

There will be just one .NET going forward, and you will be able to use it to target Windows, Linux, macOS, iOS, Android, tvOS, watchOS and WebAssembly and more.

We will introduce new .NET APIs, runtime capabilities and language features as part of .NET 5.

There were a lot of announcements at Build but this is the one that caught most of my attention.

Link: https://devblogs.microsoft.com/dotnet/introducing-net-5/

Introduction to gRPC on ASP.NET Core

gRPC is a language agnostic, high-performance Remote Procedure Call (RPC) framework. For more on gRPC fundamentals, see the gRPC documentation page.

I never noticed the docs available for gRPC. Most notably is the Comparing gRPC services with HTTP APIs

Link: https://docs.microsoft.com/en-us/aspnet/core/grpc/?view=aspnetcore-3.0

Performance Improvements in .NET Core 3.0

Back when we were getting ready to ship .NET Core 2.0, I wrote a blog post exploring some of the many performance improvements that had gone into it. I enjoyed putting it together so much and received such a positive response to the post that I did it again for .NET Core 2.1, a version for which performance was also a significant focus. With //build last week and .NET Core 3.0‘s release now on the horizon, I’m thrilled to have an opportunity to do it again.

Link: https://devblogs.microsoft.com/dotnet/performance-improvements-in-net-core-3-0/

ASP.NET Core on App Service Dashboard

Link: https://aspnetcoreon.azurewebsites.net/

Default implementations in interfaces

With last week’s posts Announcing .NET Core 3.0 Preview 5 and Visual Studio 2019 version 16.1 Preview 3, the last major feature of C# 8.0 is now available in preview.

A big impediment to software evolution has been the fact that you couldn’t add new members to a public interface. You would break existing implementers of the interface; after all they would have no implementation for the new member!

Default implementations help with that. An interface member can now be specified with a code body, and if an implementing class or struct does not provide an implementation of that member, no error occurs. Instead, the default implementation is used.

Link: https://devblogs.microsoft.com/dotnet/default-implementations-in-interfaces/

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Using AWS Parameter Store for .NET Core Configuration

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Parameter Store for .NET Core

One of the aspects I love about .NET Core is the new configuration and options pattern. In a continuation from my last post on using AWS Parameter Store for Data Protection keys, you can imagine it is possible to use Parameter Store for .NET Core Configuration.

Amazon.Extensions.Configuration.SystemsManager

There is a package by AWS that facilitates making using Parameter Store incredibly easy. Simply add the Amazon.Extensions.Configuration.SystemsManager package to your project and use the AddSystemsManager extension method on IConfigurationBuilder

The argument you pass to AddSystemsManager will be the prefix to your configuration hierarchy within Parameter Store. In my example, I’m using /Demo as my prefix, as you will also see below.


If you look at the first two entries, I can now create classes that match this hierarchy.

Configure

Next step is to add this configuration via the IServiceCollection using the Configure<T> method. Where T is our configuration type DemoConfig

This will add registration for the type IOptions<DemoConfig> so we can inject it in our Controllers or anywhere else the ServiceProvider is used.

This results in our config variable being set to the values from Parameter Store.

Parameter Store for .NET Core

If you have any questions or comments, please let me know on twitter as I will focus my posts on those questions and comments.

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