C# code formatting settings in VS Code and OmniSharp

I quite often get or see questions about configuring C# code formatting settings for Visual Studio Code.

OmniSharp (the open source Roslyn-based technology that powers C# language services) in VS Code exposes a rich set of code formatting settings which you can use to tailor and customize your C# experience.

Let’s have a look at how you can use them.

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Accessing HttpContext outside of framework components in ASP.NET Core

When developing web applications with ASP.NET, it is common to end up in situations where you require access to HttpContext. This wouldn’t be anything special, but outside of the context of framework level APIs such as controllers, middleware and so on (which would always give you a way to fetch the current HttpContext), it can be tricky.

While generally speaking, HttpContext could be passed around as a regular dependency to the logical components that require it, that solution is often impractical.

Let’s have a look at how you can get a hold of HttpContext in ASP.NET Core.

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Writing C# build scripts with FAKE, OmniSharp and VS Code

In this blog post I’d like to show an extremely – in my opinion – productive way of writing build scripts using C#. As a basis, we’ll use the excellent core FAKE library called FakeLib, which is written F# and consume it in C# scripts.

Sure, there are other projects/task runners like Cake or Bau that allow you to write C# build scripts (few more actually out there) but the approach I’d like to show you today, is I think the most productive of all, so bear with me.

More after the jump.

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Announcing ConfigR 1.0

Recently we released version 1.0 of ConfigR – a popular .NET configuration library, that lets you configure your application via C# scripts (CSX).

This is also the last release requiring full .NET 4.5/Mono – the next version of ConfigR is going to be a netstandard.

Here’s a overview of the features that are there in 1.0!

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Lazy async initialization for expiring objects

Today I wanted to share something I found myself using quite a lot recently, and that is not supported out of the box by the .NET framework.

So, as part of the framework, we have Lazy<T>, which provides out of the box support for deferring the creation of a large or resource-intensive objects.

However, what if the object requires async operation to be created, and what if its value expires after some time, and it needs to be recomputed? Let’s have a look at how to solve this.

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Introducing C# script runner for .NET Core and .NET CLI

In this post I wanted to share a little project I’ve been working on recently – a .NET CLI and .NET Core based script runner for C# (CSX scripts).

The idea was super simple – I just wanted to be able to author C# scripts using .NET Core, leverage project.json to define the script dependencies and execute scripts cross platfom using .NET CLI – via a dotnet script command.

The project is located here on Github. You can head over and have a look at readme to get started – but, briefly, the key features are listed here.

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Strongly typed configuration in ASP.NET Core without IOptions<T>

There are several great resources on the Internet about using the new Configuration and Options framework of ASP.NET Core – like this comprehensive post by Rick Strahl.

Using strongly typed configuration is without a question a great convenience and productivity boost for the developers; but what I wanted to show you today is how to bind IConfiguration directly to your POCO object – so that you can inject it directly into the dependent classes without wrapping into IOptions.

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[Controller] and [NonController] attributes in ASP.NET Core MVC

One of the late additions before the RTM release of ASP.NET Core MVC was the introduction of the [Controller] attribute, and its counterpart, [NonController], which were added in RC2.

Together, they allow you to more specifically control which classes should be considered by the framework to be controllers (or controller candidates) and which shouldn’t. They also help you avoid the nasty hacks we needed to do in i.e. ASP.NET Web API to opt out from the “Controller” suffix in the name.

Let’s have a look.

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Building Analyzers & Refactoring Tools with Roslyn (from NDC Sydney)

Last month I was at the excellent NDC Sydney conference, where I did a talk about building code analyzers and refactoring tools with Roslyn. Below you can find the the video, code and slides from the session.

Thanks to everyone who attended – I had great fun, and I was even mugged by a kangaroo afterwards.


You can watch the talk on Vimeo. And if you are wondering, yes, my t-shirt says “#ENDREGIONS”.


Just go to this URL. Slides are powered by the almighty FsReveal – they are HTML that was generated from Markdown, because you know, it’s 2016, so we must have build scripts for our slides these days :)


All the demo code is hosted at Github.