.NET type forwarding
This feature has apparently existed for years, but I found out only now. CLR has an equivalent of HTTP redirect for types, it is called You can move a class […]
.NET
VS 2019 and AspNet.Core: the world of weird errors
I was experimenting with creating new projects out of templates in VS 2019, and to my surprise ran into a lot of trouble and error messages. One time it told […]
Unity container: when it is too much magic
“Any sufficiently advanced technology is indistinguishable from magic” Athur C. Clarke While reviewing some code, I stumbled upon a class that receives an ObservableCollection<ILogFormatter> in the constructor. I discovered that this […]
C#: How to shoot yourself in the foot with a generic extension method
TL;DR: wrapping existing method DoSomething(MyData data), with an identically named generic extension method DoSomething<T>(T data) is a bad idea, since it erases compile-time type checking. DoSomething() may now be called […]
VS 2017+ASP.NET Core+Docker: published dev image does not work
I created an ASP.NET core project with docker support. Good thing: it works. Bad thing: the “dev” image it creates does not really contain application code. The code is added […]
Unity Container and double singleton
It turns out that after re-registering type as a singleton in Unity calls to container.Resolve() return a new instance. This may lead and have led to ugly bugs if your code relies […]
Why constructors must be simple
Recently I’ve got another reminder why constructors should be simple. The situation in a nutshell: class BaseHandler subscribes to an observable in its constructor. The handler is virtual, class DerviedHandler adds incoming […]
.NET string comparison is not lexicographical
This Friday I wrote a unit test and to my astonishment I have found that “a” < “A” < “ab”, with .NET InvariantCulture and InvariantCultureIgnoreCase string comparers. That means that .NET […]
How to do console output in WPF
If you wish to access standard input and output in your WPF app, you will have to compile it as a Console app and fire up the WPF application object […]
TaskTimer: how to execute task on a timer
Over the week-end I created the TaskTimer class that allows to execute code on timer in an async method: static async Task DoStuffOnTimer() { using (var timer = new TaskTimer(1000).Start()) { foreach (var task in timer) { await task; DoStuff(); } } } Source […]