Davide Bellone articles - 109 total
C# Tip: ObservableCollection - a data type to intercept changes to the collection
ObservableCollection is a data type that allows you to react when an item is added or removed from the collection. Let’s learn more!
C# Tip: IFormattable interface, to define different string formats for the same object
Same object, different string representations. How do we achieve it in a standardised way?
How to create custom snippets in Visual Studio 2022
A simple way to improve efficiency is knowing your IDE shortcuts. Let’s learn how to create custom ones to generate code automatically.
Is Random.GetItems the best way to get random items in C# 12?
You have a collection of items. You want to retrieve N elements randomly. Which alternatives do we have?
Davide's Code and Architecture Notes - Cache Expiration vs Cache Eviction (and Eviction Policies)
Caching helps your applications be more performant. However, depending on the cache size, you’ll need to sacrifice some items to make space for others. Let’s see some strategies.
Davide's Code and Architecture Notes - Tracking decision with Architecture Decision Records (ADRs)
When designing a system’s architecture, you have many choices to make. How can you track them? ADRs are formal documents to track the reasons behind your decisions, giving context and info about the consequences of each choice.
Davide's Code and Architecture Notes - Introducing SLI, SLO, and SLA
Non-functional requirements. How can you ensure you meet them? Let’s understand SLO, SLA, and SLI, and how they affect your SDLC.
Why reaching 100% Code Coverage must NOT be your testing goal (with examples in C#)
Average teams aim at 100% Code Coverage just to reach the number. Great teams don’t. Why?
4 ways to create Unit Tests without Interfaces in C#
C# devs have the bad habit of creating interfaces for every non-DTO class because «we need them for mocking!». Are you sure it’s the only way?
C# Tip: Use TestCase to run similar unit tests with NUnit
In my opinion, Unit tests should be well structured and written even better than production code. In...
How to kill a process running on a local port in Windows
Now you can't run your application because another process already uses the port. How can you find that process? How to kill it?
How to extract, create, and navigate Zip Files in C#
When working with local files, you might need to open, create, or update Zip files. In this article,...
Davide's Code and Architecture Notes - 4 algorithms to implement Rate Limiting, with comparison
When developing any API application, whether it is a monolith, a microservice, a distributed system,...
C# Tip: How to create Unit Tests for Model Validation
Model validation is fundamental to any project: it brings security and robustness acting as a first...
Pre-commit hooks with Husky.NET - build, format, and test your .NET application before a Git commit
If you need to run operations before completing a Git commit, you can rely on Git Hooks. Git hooks...
Davide's Code and Architecture Notes - Pros and Cons of API Gateways (plus vendors comparison)
Especially when talking about microservices, many articles and videos focus on an architectural...
Davide's Code and Architecture Notes - L4 vs L7 Load Balancer
When handling a massive amount of requests, a system generally needs to balance the incoming load to...
OhMyPosh and CascadiaCode not working on PowerShell? How to fix it in Windows 10 and Windows 11 Integrated Terminal
The content of the blog you are reading right now is stored in a Git repository. Every time I create...
How to integrate Feature Flags stored on Azure App Configuration in an ASP.NET Core Application
Feature Flags let you remotely control the activation of features without code changes. They help you...
Davide's Code and Architecture Notes - Postel's law for API Robustness
When designing and building Web APIs, we should follow Postel's law to make our API more...
C# Tip: Access items from the end of the array using the ^ operator
Say that you have an array of N items and you need to access an element counting from the end of the...
Top 6 Performance Tips when dealing with strings in C# 12 and .NET 8
Sometimes, just a minor change makes a huge difference. Maybe you won't notice it when performing the...
PriorityQueues on .NET 7 and C# 11
Starting from .NET 6 and C# 10, we finally have built-in support for PriorityQueues 🥳 A...
How to solve InvalidOperationException for constructors using HttpClientFactory in C#
A few days ago I was preparing the demo for a new article. The demo included a class with an...
How to log Correlation IDs in .NET APIs with Serilog
Correlation IDs are values that are passed across different systems to correlate the operations...
Clean Code Tip: Avoid subtle duplication of code and logic
Duplication is not only about lines of code, but also about data usage and meaning. Reducing it will...
C# Tip: Use Debug-Assert to break the debugging flow if a condition fails
Sometimes, while debugging, you want to check if the state of your code is still valid, or, at least,...
PostgreSQL CRUD operations with C# and Dapper
In a previous article, we've seen how to perform simple CRUD operations on a Postgres database by...
3 (and more) ways to set configuration values in .NET
Needless to say, almost every application needs to deal with some configurations. There are tons of...
Clean Code Tip: Keep the parameters in a consistent order
If you have a set of related functions, use always a coherent order of parameters. Take this bad...