Time is an external dependency. That may sound unusual at first because DateTime.UtcNow is available anywhere without configuration. This convenience becomes a problem as soon as business rules depend on the current …
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Error responses are part of an API contract. Still, many systems grow them incidentally: one endpoint returns { "error": "not found" }, another returns an array of validation errors, a gateway adds its own structure and …
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.NET 11 adds a small but useful improvement to the built-in observability story: MemoryCache can now publish OpenTelemetry-compatible metrics directly through System.Diagnostics.Metrics. That makes cache behavior visible …
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Many long-lived .NET repositories did not start with semantic versioning. They grew up with major.minor.build.revision, often set in AssemblyInfo.cs, sometimes mixed with wildcard auto increment, sometimes duplicated …
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ASP.NET Core applications are usually released often enough that versioning stops being a documentation concern and turns into delivery infrastructure. Once an application moves through CI, staging, production, …
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Desktop software makes versioning visible in a way that web systems often do not. A backend can hide a surprising amount of release machinery behind its platform. A Windows executable cannot. Explorer exposes file …
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Versioning stays invisible right up to the point when it fails. A package has to be reissued, a support case depends on one exact binary, or staging and production turn out to run artifacts from the same commit that do …
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IMemoryCache is great for speeding up expensive operations (database reads, HTTP calls, heavy computations). But many real systems need more than a TTL:
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.NET 10 is the next Long-Term Support (LTS) release in the .NET family. LTS matters because it’s the version many teams standardize on for the next 2-3 years: you get a stable baseline, predictable support windows and a …
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Azure now provides a unified Realtime API for low‑latency, multimodal conversations over WebRTC or WebSockets. If you’ve used the earlier preview versions (for example the GPT‑4o realtime preview), the new generation …
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Logging is part of the contract of many components: when things fail, when branches are taken, when work completes. If a class owns logic, it should own its log output too. That makes logs worth testing–especially for …
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When working with asynchronous or parallel code in C#, you’ll inevitably encounter two common ways to start tasks: Task.Run and TaskFactory.StartNew. At first glance, they seem similar - but they behave differently and …
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The Model Context Protocol (MCP) server acts as a centralized context management backend for advanced AI applications. Unlike traditional session or prompt-based approaches, the MCP server manages a persistent, …
Read Blog Post.NET does not have a built-in mechanism for querying DNS records; nevertheless, this is a use case that is required relatively often.
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Nowadays, you can’t actually run a website on the Internet without having a protection mechanism against content bots. One possibility is the use of CAPTCHAs. CAPTCHAs are small tasks that a human can easily solve, but a …
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With .NET 9, Microsoft has added new options to the System.Text.Json library to format the output of JSON objects - features that, in my opinion, should have been available with day 1.
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The recommended variant for specifying the SDK in .NET is the global.json file. This centrally guarantees that all computers on which the code is compiled ideally have the same SDK installed and use it.
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For several years now, C# has supported Records as a new “type”. Initially only for classes (which is why the class is optional for a record class), later also for structs. Records are specially designed for use as data …
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Anti-idle apps for Microsoft Teams and the like are a dime a dozen, but how about creating your own? In this article, I’ll show you how to create an anti-idle app for Microsoft Teams using .NET and C#.
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QR Codes are a very popular way to pass on information - for example an URL. The QR code can be placed on all kinds of places, for example in parking lots for buying parking tickets.
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The Microsoft Graph and Entra documentation are both very comprehensive and provide a lot of information - but they often contain no examples or no working examples. In addition, the SDKs are either not, insufficiently …
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If you browse through certain libraries or the .NET Runtime from time to time, you will notice that the attribute MethodImplOptions.AggressiveInlining can be found in some places - but what is this actually?
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New year - new .NET drama. You would have thought that positive lessons had been learned from the last Moq drama; but we were proven wrong.
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In the world of Microsoft SQL Server , views are a powerful tool for simplifying complex data queries. Simple views offer no real performance gain but are often used to implement simple database queries (I still would …
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EF Core Migration Bundles are standalone executable files that contain one or more Entity Framework Core migrations and can be applied directly to a database. They are particularly useful for deploying migrations …
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There are various reasons why it is useful to channel certain requests through your own application to an external endpoint; the most obvious is, for example, as a workaround for client statistics from browser adblockers …
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Rate Limit is a great tool to protect your own website and content from misuse; in some cases, however, rate limiting is also bad: for example, if you want your own content to be indexed by Google Search in order to …
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There are many ways to remove spaces or other characters in a string - there are just very big differences in terms of performance and efficiency.
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Code formatting is a very important element when developers work together on a project - and you are always well advised not to invent your own formatting rules, but to use those that are a standard or de facto standard …
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Sustainable Code is a constantly growing GitHub repository created by me , in which I collect various everyday code snippets and measure the performance of the different implementation ways. The goal is to create a …
Read Blog PostA popular unit test - and also a necessary test - is the correct registration of interfaces and their implementation with dependency injection. And a common mistake is that the associated IServiceCollection interface is …
Read Blog PostWhen working with ZIP files in .NET, there may be cases where the file is not stored on disk but comes directly as a Stream. This could happen if you’re downloading the ZIP file from a network, receiving it via an API or …
Read Blog PostWorking with compressed files is common in many applications, whether you’re extracting data from an archive, installing software packages or retrieving bundled files. Thankfully, .NET finally provides an efficient, …
Read Blog PostWhen working with .NET apps you may sometimes need to bundle multiple files into a single compressed archive for easier storage, transfer or processing. In this post, I’ll show you a simple and effective way to compress …
Read Blog PostIn C# (.NET 6 and above), there is now a very simple way to read out the CPU load with minimal overhead - i.e. without threads. The PerformanceCounter from the System.Diagnostics namespace helps us with this.
Read Blog PostDealing with empty lists is an everyday situation in .NET. An empty list is often preferred to a null in order to control the logic. But how expensive is it to return an empty list?
Read Blog PostWe are currently in the preview phase of .NET 9 , which releases in Nov 2024 - and if you want to test it extensively like I do, store the preview version in the global configuration global.json . But how do you have to …
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Strings are one of the most commonly used types in .NET applications - and very often the source of inefficient code. For example, cleaning up a string - such as removing invalid or non-visible characters - is one of the …
Read Blog PostRefit is an open-source library for .NET developers that simplifies the process of making HTTP API calls. It allows developers to define a set of interfaces that describe the API endpoints they want to interact with and …
Read Blog PostStrong Name Signing is a mechanism in .NET development that ensures the integrity and authenticity of assemblies. It is based on a public-private key procedure. Contrary to what many assume, this is not a security …
Read Blog PostYAML files are unfortunately part of everyday life for all developers these days; and although they are very error-prone and almost impossible to edit without an IDE and schema information without constantly running into …
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TLDR; You can see the full sample in my GitHub repository BEN ABT Samples - ASP.NET Core Form protection with Cloudflare’s Turnstile
Read Blog PostIt’s now been a few months since the GDPR-drama and data-harvesting around Moq (Stop using Moq as a guinea pig to get feedback on and develop SponsorLink ) happened - and the only conclusion that remains is: please …
Read Blog Post.NET event counters are a relatively new API for collecting metrics from .NET applications. They are part of the EventSource and EventCounter namespace since .NET (Core) 3.0.
Read Blog PostBy default, Azure Application Insights comes with necessary and important telemetry capabilities to monitor the basic functions of an application and collect telemetry.
Read Blog PostThe Azure Communication Service is a fairly new but already popular service for sending emails at scale. In this article, I would like to show you how you can use the service via a connection string in your .NET project. …
Read Blog PostThe Azure Communication Service is a fairly new but already popular service for sending emails at scale. In this article, I would like to show you how you can use the service via a Azure Managed Identity in your .NET …
Read Blog PostOne of the last blog posts (Text and EMail Templates with Handlebars.NET ) was generally about HandleBars.NET - a very popular template engine. This post is about how you can easily implement layouts with Handlebars.
Read Blog PostAPI models are one of the elements where I personally see the most naming errors - which have a massive impact on the architect and cause subsequent errors. The solution is very simple: follow the naming rules!
Read Blog PostIn many code bases there are Services and Providers - and often they do the same thing structurally; but what is the idea of a Service- and Provider-Classes?
Read Blog PostDatabase entities are the objects that represent the tables in your database. They are the objects that you use to read and write the database.
Read Blog PostOften seen, often used incorrectly: DTOs. Data Transfer Objects. In principle, DTO is an umbrella term, a design pattern that is used to transfer data between. In reality, however, the umbrella term is used directly as …
Read Blog PostA frequent requirement in apps is the conversion of templates, e.g. for sending e-mails, for PDF templates or other text modules. There are many different ways to do this, ranging from simple string replacements to the …
Read Blog PostQR codes are a simple and very popular way of exchanging data and information - even in .NET. They have become part of everyday life.
Read Blog PostThere are various ways to deploy an application, but Zip deployment is the variant that is recommended the most - regardless of whether you are using Azure, AWS or other cloud and hosting providers.
Read Blog PostWith .NET 8, the System.ComponentModel.DataAnnotations Namespace has been revised and some new attributes have been added that have been requested by the community for some time and have only been implemented through …
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A database entity represents an identifiable entry, often also things from the real world, which are to be stored and managed in the database. The purpose of database entities is to provide a structured and efficient …
Read Blog PostIn C#, optional arguments are parameters in a method that have default values specified in the method’s declaration. This means that when you call the method, you can omit values for these optional parameters and the …
Read Blog PostAs has been the case for many releases, the .NET 8 team is spending a lot of development effort to improve the .NET Runtime in terms of performance. Because fast performance means one thing above all: low energy …
Read Blog PostSome APIs do not follow standards, ignore ISO8601 and return UnixTime. This is not nice, but can be easily fixed with a custom converter for System.Text.Json.
Read Blog PostA little more than three months ago, Microsoft integrated a new functionality into Visual Studio 2022: Build Acceleration . This mechanism, which can be optionally activated, apparently ensures that build times for .NET …
Read Blog PostI often see snippets in EF Core code reviews such as the following: 1dbContext.Users.Where( user => user.Id == id ); The query filter user => user.Id == id is contained directly in the Where - often not just in one place …
Read Blog PostUnit testing is a type of software testing that is performed on the smallest unit of a software application, called a “unit”. A unit can be a function, method or module that is tested in isolation from other parts of the …
Read Blog PostIn many software architectures the problem exists that there are methods, which are specified a multiplicity of type-same parameters, whose meaning is however fundamentally different. In principle, this includes all …
Read Blog PostSeptember last year, Microsoft announced that a large number of backend services would be migrated to .NET 6. This, they said, was an enterprise-wide initiative .
Read Blog PostStructs have their advantages in .NET: they are especially efficient in the runtime if used correctly. But if you use structs with an interface, the massive advantages unfortunately turn into disadvantages: As soon as an …
Read Blog PostBoth C# is null and == null are used to check if a variable or object is null, but they work slightly differently.
Read Blog PostSymbolic Links (often abbreviated as symlinks) are a type of file or folder shortcut in Windows that reference another file or folder in the file system, rather than copying its contents. Unlike a normal shortcut, a …
Read Blog PostThe isolated mode of Azure Functions with .NET allows for greater control over the runtime environment and dependencies of the function. In this mode, the function runs in its own process, separate from the Azure …
Read Blog PostStatische Methoden in C# sind Methoden, die auf eine Klasse und nicht auf eine bestimmte Instanz einer Klasse angewendet werden. Sie können aufgerufen werden, ohne dass zuvor eine Instanz der Klasse erstellt wurde. Ein …
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Expressions are now an absolute part of a developer’s everyday life in .NET thanks to Linq. However, due to their nature, expressions are not one of the very best performing tools, which is why the .NET team is also …
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.NET has two principal ways for handling times: DateTime and DateTimeOffset . The big deficit of DateTime, which was also recognized early in .NET 1.0, is that it is not clear from the DateTime information which time …
Read Blog PostMicrosoft has announced in an impressive blog post on the .NET DevBlogs that they have started an enterprise-wide migration to migrate backend services.
Read Blog PostBeginning with C# 3, variables that are declared at method scope can have an implicit “type” var. An implicitly typed local variable is strongly typed just as if you had declared the type yourself, but the compiler …
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Requirements You must have created an IoT Hub in Azure. You must have created a device in your created Azure IoT Hub . You need the connection string your IoT Hub device (IoT Hub -> Devices -> Select Device -> …
Read Blog PostIn .NET, there is a very fast and easy way to pump a variety of entities into an SQL database: SqlBulkCopy
Read Blog PostThis pretty simply snippet exports your Image into a byte-array. 1public static byte[] ToByteArray(this System.Drawing.Image image) 2{ 3 using(MemoryStream memoryStream = new MemoryStream()) 4 { 5 …
Read Blog PostThe most current and currently recommended way to download .NET Framework, .NET Standard or .NET Core files from the Internet is the HttpClient class.
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Unter anderem durch die Aktivität im myCSharp.de-Forum ist mir aufgefallen, dass viele Entwickler doch Probleme mit der Konfiguration von WCF-Diensten haben. Zugegeben; ich bin auch kein großer Fan des …
Read Blog PostDie Zeit am Flughafen möchte ich dazu nutzen einer meiner Anfragen per E-Mail zu beantworten. Hallo Benjamin, wie testest du Quellcode, der mit internal deklariert ist?
Read Blog PostDieser Codeschnippsel soll exemplarisch zeigen, wie man in C# eigene Events definiert. Als Beispiel dient hier die Überwachung von E-Mails in der Konsole.
Read Blog PostOft werden Warteschlangen benötigt, um Aufgaben zu Verwalten oder durch etwaige Parallelität die Performance zu Steigern. Mit .NET 4.0 hat Microsoft einen großen Schritt in diese Richtung getan und den Entwicklern durch …
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