Foundations of building object-oriented infrastructures Despite the fact that C# is a very rich on features language, it's very common to see poorly designed and implemented types in a real world. In fact, C# is one of the richest on features language among object-oriented languages in the world nowadays. But with great power comes great responsibility. It's challenging to use all those features in a right [...]
This is the third and most comprehensive part about handling errors and exceptions in C#. Here are the first and the second part. Also, you can take a look at the blog post about global exceptions handling in WPF applications. Errors Handling and many other topics you’ll find in my new video course “API in C#: The Best Practices of Design and Implementation”. Take [...]
Nowadays I’m writing my new programming video course. I chose an interesting topic for the next course: “Designing and Implementing API in C#”. How to design API? In this course, you’ll learn how to design and implement types in C# so that the other developers won’t hate you when using one of the types developed by you. It means you are going to learn [...]
Primitive Types Obsession Problem Today I’m going to discuss the problem of using primitive types instead of abstractions. This problem was discussed in the blog of Mark Seemann. Read it, if you haven’t read it yet. In this post I’m going to talk about Money type as an abstraction instead of using decimal type for representing money-values. In the last project I’ve been participating [...]
Mark Seemann has written a nice post “Service Locator violates encapsulation”. The name of the post speaks for itself that it’s about a pattern (anti-pattern) named Service Locator. When a programmer arbitrarily inside the code base calls for the IoC-container to resolve a dependency of an object – he uses a Service Locator anti-pattern. Mark provides the following example: [code language=”csharp”] public class OrderProcessor : [...]
This topic is going to be simple, yet an interesting one. I’ll try to expose here my feelings about a certain case of null-checking. It’s a well-known fact that introducing null-values considered by its inventor, Tony Hoare, as a billion-dollar mistake. Despite of some “modern” practices like making classes immutable, applying Null-Object pattern or using Code Contracts extensively, we still often want to declare [...]
Big Functions Hell Well, now it’s hard to remember the moment, when I first time realized that it’s actually a good idea to extract functions from the massive chunks of useful code. Either I got this knowledge from the “Complete Code” or “Clean Code” – it’s hard to recall. Actually, it does not matter so much. We all know that we should split the [...]