Tech

AZ-900 exam – questions & answers (my perspective)

Last week I took the AZ-900 exam and when I wrote about it, I received a few repetitive questions so I decided to write a blog post instead of answering the same questions again and again ;). I’m sorry, I’m lazy.

As an introduction, let me mention that the exam is a test consisting of 42 questions. It covers mostly the basics of Azure.

Continue Reading
C#, Tech

Cannot implicitly convert type ‘Abc<Derived>’ to ‘IAbc<Base>’ – Contravariance vs Covariance – part 2.

Today I will write about the way variance (<in T> and <out T>) influences type checking in C#. Yes, the fact that one type can be passed to a generic method that requires another type, depends on these 2 small keywords we write before ‘T’ (or whatever ?) in interface header. BTW this article is the continuation of my previous post that makes a dummy introduction to the variance – if you haven’t seen it, then you should :P. Not because I wrote anything important there, but because my google analytics statistics will grow. So as you can see – it’s worth it :P.

Continue Reading
C#, Tech

Enumerable.Empty<T>() vs new ‘IEnumerable’<T>() – what’s better?

Reading Microsoft documentation when we have all that stackoverflow questions with answers usually seems a waste of time. And as a typical, lazy programmer I admit that (much too often) I agree with that sentence ?. But today I decided to check how Enumerable.Empty<T>() works and wasn’t satisfied with the knowledge I got. I started digging a little bit deeper and wasted some of the precious beauty-sleep time  so if you want to know what’s happening when you add an element to an empty collection, let me tell you a story of today’s night.
No, not that story, you sick head! Continue Reading

Tech

How to change language in Visual Studio 2019 (after installation)

I installed Visual Studio 2019 RC recently and accidantely forgot to select English as default language. Of course, I realized that mistake after installation and I had to spend way too much time on finding the solution for this problem (yeah, that’s weird, I know). So, I decided to write a short tutorial how to do it. I’m 100% sure, the future me will thank myself for this :D.

Continue Reading

C#, Tech

C# 8 features – part 1.

If you were online at least once in the previews week you probably noticed the biggest announcement from Microsoft! Yeah, everybody is talking about C# 8 planned features. And because the news is literally everywhere, I gave up and decided not to repeat what everybody already read. But that decision is no longer valid because back THEN (which means – yesterday or so) my pet project wasn’t so nasty and I wasn’t so stuck in the middle of some stupid, trivial task that seems to be unable to accomplish… So yeah, I changed my mind, I will wrote about C# 8, just to avoid touching (for at least a day 😉 ), the disaster I programmed :D. No, it’s not procrastination, not at all! ?

Continue Reading