Having fast API response is crucial for your applications. In this article you'll see how I managed to improve an API application that took 14 secs each call.
DateTime, Guid, and Random values are not under your direct control. You should abstract them to write better code and testing. We'll see 3 ways to inject and test them in .NET Core projects.
Is string.Format obsolete? Not at all, it still has cards to play! Let's see how we can customize format and create custom formatters.
How to effectively ping an endpoint in C#? Don't use the HttpClient, when .NET provides a Ping class to perform all these operations.
MongoDB is a database based on JSON-like documents, but it can be queried using C#. We'll see how to perform CRUD operations and we'll create some advanced queries.
Wouldn't it be nice if Visual Studio could autogenerate clients for external API? It is actually possible, if they expose an OpenAPI file. Let's see how!
Swagger is a tool that exposes the documentation of your APIs and helps collaborating with other teams. We'll see how to integrate it with .NET Core 3, how to add XML comments and status codes.
Integration tests are useful to check if multiple components fit together well. How can you test your APIs? And how can you mock dependencies?
You're using DateTime.Now, aren't you? Be careful, because it may bring some troubles to your application. Here I'll explain why and I'll talk about time zones and formatting in C# DateTime.
Sometimes on your tests you need to access test files, for example for mocking external data. With manifest resources you can easily reference files for your tests.
BenchmarkDotNet allows you to test the performance on .NET methods. So let's answer a question: is the Enum.HasFlag method really that slow?
Validating inputs is crucial for every application. If you want an easy and versatile way, you can try FluentValidation.
Internal members can be accessed only within the same assembly. And for different assemblies? Here's for you the InternalsVisibleTo attribute!
Singleton, Scoped and Transient: these are the possible lifetimes for DI with .NET Core. How do they change the way objects are constructed?
We've already seen some of the things you should know about enums in C#. Here we'll dive into Flagged enumerations, serialization and so on.
Enums are often used with C#. Boring, right? Maybe there is something you didn't know: casting, parsing and flagged enums.
Asynchronous programming is often seen as something cumbersome, so many developers avoid it. What, why and how to use it? Here are the first steps you can take to approach async programming.
We have already seen how to search for videos in a YouTube channel. Now it's time to get details for a single video.
YouTube provides some APIs for getting info about a channel videos. But they also provide .NET libraries to achieve the same result with C#. Let's have a try!
Extension methods in C# are really useful, but there are few rules to follow...
The CollectionAssert class if fine for basic tests on collections in C#. We will have a look at the methods exposed by this class.
I'm pretty sure that you've already used Guids in C#, but have you ever stopped to think what they are under the hood?an 3 seconds to load. Here you'll learn few trick to improve your site performance.
More than 50% of mobile users abandon a website if it takes more than 3 seconds to load. Here you'll learn few trick to improve your site performance.
On November I shared on Twitter an article each day. They were about C#, general programming and advanced topics. For celebrating the conclusion of this challenge, I wrote a poem about that.
Is it true that the inverse of a negative number is always a positive number? If you think it's true, you might get a subtle error while implementing comparison.
The StringAssert class is a hidden feature of the MSStest framework. Not so many methods, but they can help you with basic tests with strings.
The Assert class is the first step you'll probably take into unit testing. But do you know that there's more than the IsTrue() method?
Some of the things I learned at .NET Conf Italia: interfaces and abstract classes, Blazor, C# default interfaces and .NET Core on Samsung TV
Is a string empty? What if it contains only white spaces? You shouldn't reinvent the wheel, since .NET exposes methods exactly for these cases: String.IsNullOrEmpty and String.IsNullOrWhiteSpace.