Using an existing Startup class with ASP.NET 6 minimal hosting model

net 6 asp.net core c-sharp

With the .NET Core 2.1 having reached end of life, and the looming end of life dates for .NET 5 (this spring) and .NET Core 3.1 (this fall), a lot of developers are facing migrating their services to .NET 6.0. Depending on the customization level and the sheer scale of your service ecosystem this may be an easy or relatively complicated task - especially if you would like to additionally tap into the new lightweight hosting model around WebApplication type.

A very low-cost, easy approach to this is to take advantage of the fact that one can easily reuse an existing Startup class with the new hosting model too. This allows leaving most of the code intact, and performing only tiny refactorings around the host bootstrapping.

Hello OmniSharp on .NET 6.0!

net net 6 omnisharp roslyn

On December 15, 2021 we released version 1.38.0 of OmniSharp which, for the first time, included .NET 6.0 builds of the OmniSharp server. The related feature branch was maintained for over a year, and previously contained a .NET 5-based variant of OmniSharp, though that one was never released.

This is a big milestone in the OmniSharp project as the .NET 6.0 build is much faster and a lot more stable, and is the first step towards retiring the .NET Framework/Mono builds of OmniSharp.

Q# Advent Calendar 2021 – Partial application in Q#

q-sharp quantum computing
Recently, as part of Q# Advent Calendar 2021, I published a special quest post on Q# Community blog. You can find my post on “Partial callable application in Q#” on the here. Enjoy!

Difference between R1 and Rz gate in quantum computing

q-sharp quantum computing

In this post we will have a look at the subtle difference between two single qubit rotation gates - Rz and R1. Q# distinguishes between them, and the are de facto the same, yet differ in a very subtle way.

dotnet-script 1.3 is out with .NET 6.0 support

net 6 csharp 10 dotnet-script scripting

Last week we released version 1.3 of dotnet-script. The latest release introduces support for .NET 6.0 and C# 10 and is available, as usually, through Github releases and on Nuget. You will need to have at least the .NET SDK 6.0.100 installed.

The related language services in OmniSharp (e.g. C# extension for VS Code) have already been updated accordingly a while ago.

dotnet-script 1.2 is out with assembly isolation feature

net c-sharp dotnet-script scripting

Last month we released version 1.2 of dotnet-script. This was already 36th release of the tool and I am proud to say all the dotnet-script releated packages on Nuget have passed 1 million downloads - thanks a lot!

The latest release (which already has a 1.2.1 patch too), contains several useful bug fixes, including a memory leak and one excellent new feature - assembly isolation.

Beautiful and compact Web APIs revisited – with C# 10 and .NET 6 Preview 7

net 6 asp.net core csharp 10

Back in 2012, when the Roslyn compiler was still closes source and its early CTP stages, I blogged about using its C# scripting capabilities to wire up an ASP.NET Web API server in just a few lines of code, with minimal ceremony. In 2014 I built an OWIN-based host, on top of the, then already well-stablished, scriptcs C# scripting project, that utilized the experimental IIS “Helios” server to provide a framework for building tiny C# web applications.

In 2017 I blogged about about building lightweight, minimal microservices with the early versions of ASP.NET Core. Last year, as ASP.NET Core and the “mainstream” C# (despite the initial resistance) started adopting some of these C# scripting concepts, I wrote how they have been incorporated into ASP.NET Core in .NET 5.0, along with diving into some further improvements for building these lightweight Web APIs.

It is now time to have a look at the latest set of changes in this space - as .NET 6 Preview 7, the latest one at the time of writing, and, in particular, C# 10, bring a lot of extra exciting things to the table.

Eager refresh of values for AsyncExpiringLazy

net c-sharp

Some time ago I blogged about introducing a new library, called AsyncExpiringLazy, which can be used for managing lazy-resolved values that expire and must be refreshed - such as for example access tokens to web APIs.

Yesterday I pushed out a release 2.1.0 of the library, which features a unique new feature - built thanks to the great work of Lukasz - some new additional semantics for the way how the captured value gets refreshed.

The curious case of ASP.NET Core integration test deadlock

net core asp.net core testing

One of the common approaches to testing ASP.NET Core applications is to use the integration testing available via the Microsoft.AspNetCore.TestHost package. In particular, the arguably most common scenario is integration testing of the MVC applications via the Microsoft.AspNetCore.Mvc.Testing, which provides a set of MVC-specific helpers on top of the test host.

In this post I want to share a curious case of deadlocking integration tests in an ASP.NET Core 3.1 application.

Introduction to quantum computing with Q# – Part 19, Quantum Phase Estimation

intro to qc q-sharp quantum computing

Last time we discussed the Quantum Fourier Transform - one of the important building blocks for more complex quantum algorithms. In this post, we will build upon that knowledge and take advantage of the QFT functionality, to explore another important subroutine that is used in many quantum programs, namely quantum phase estimation.

About

Hi! I'm Filip W., a software architect from Zürich 🇨🇭. I like Toronto Maple Leafs 🇨🇦, Rancid and quantum computing. Oh, and I love the Lowlands 🏴󠁧󠁢󠁳󠁣󠁴󠁿.

You can find me on Github, on Mastodon and on Bluesky.

My Introduction to Quantum Computing with Q# and QDK book
Microsoft MVP

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