Andrea Staccini

🚨 WORST Angular MISTAKES TO AVOID 🚨  After reviewing projects, mentoring teams, and digging into Angular features, I’ve noticed the same mistakes repeating again and again. Some come from rushing deadlines, some from habits carried over from older Angular versions, and some from not keeping up with the latest best practices.  I’ve grouped them into two simple categories 👇  🧩 Bad Coding & Architecture Practices   - Skipping unit & integration tests   - Hardcoding configs & environment values   - Mixing business logic inside components   - Overusing 3rd-party dependencies (npm fatigue)   - Avoiding state management for complex flows   - Mutating state directly (breaking immutability)   - Misunderstanding dependency injection scopes   - Copy-paste driven development instead of abstraction   - Ignoring smart/dumb component separation   - Creating “god services” that handle everything   - Forgetting route guards & lazy route protection   ---more ⚡ Performance & Modern Angular Pitfalls   - Ignoring OnPush change detection (or applying it blindly)   - Binding functions directly in templates   - Overusing async pipes everywhere   - Nesting subscribes instead of using switchMap/mergeMap   - Not unsubscribing (or not using takeUntilDestroyed / asyncPipe)   - Misusing Signals like Observables   - Forgetting lazy loading & route-level code splitting   - Ignoring hydration & defer blocks in Angular 17/18   - Overusing ChangeDetectorRef.detectChanges()   - Not using trackBy in @for loops (huge perf issue in lists)   - Skipping SSR, pre-rendering, or PWA optimizations   ---more 💡 The good news? Almost all of these mistakes have straightforward fixes if you adopt modern Angular patterns, profiling tools, and a clean architecture mindset.  👉 I’ve put the full detailed checklist (80+ pitfalls) into a single copy-ready format, happy to share if you want it.  💬 What’s the worst Angular mistake you’ve seen in production?  Follow Sonu Sindhu for more Angular tips & clean code practices 🚀  #Angular #WebDevelopment #Performance #CleanCode #Frontend #JavaScript

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Quick C# Tip 💡 Use the Switch expression in your code. The switch expression was introduced in C# 8.0, and it's a more compact and readable way of writing a switch statement. Instead of using a break for each case, the switch expression uses the => operator to return a value when a case matches immediately. For anyone wondering, they get lowered to the same code by the compiler. Here's how the code can be rewritten using a switch expression: P.S. Join 17,600+ engineers for free content: TheCodeMan.net

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🚀 𝐖𝐡𝐚𝐭’𝐬 𝐭𝐡𝐞 𝐃𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐜𝐞 𝐁𝐞𝐭𝐰𝐞𝐞𝐧 ‘𝐔𝐬𝐞’, ‘𝐌𝐚𝐩’, 𝐚𝐧𝐝 ‘𝐑𝐮𝐧’ 𝐢𝐧 𝐀𝐒𝐏.𝐍𝐄𝐓 𝐂𝐨𝐫𝐞 𝐌𝐢𝐝𝐝𝐥𝐞𝐰𝐚𝐫𝐞? 🚀 ⁉️ 𝐄𝐯𝐞𝐫 𝐛𝐞𝐞𝐧 𝐜𝐨𝐧𝐟𝐮𝐬𝐞𝐝 𝐚𝐛𝐨𝐮𝐭 𝐰𝐡𝐞𝐧 𝐭𝐨 𝐜𝐡𝐨𝐨𝐬𝐞 𝐔𝐬𝐞, 𝐌𝐚𝐩, 𝐨𝐫 𝐑𝐮𝐧 𝐢𝐧 𝐀𝐒𝐏.𝐍𝐄𝐓 𝐂𝐨𝐫𝐞? Let’s break it down in a clear and simple way 👇 🧱 𝑾𝒉𝒂𝒕 𝒊𝒔 𝑴𝒊𝒅𝒅𝒍𝒆𝒘𝒂𝒓𝒆? In ASP.NET Core, middleware is a component that handles HTTP requests and responses. Each component can: Decide whether to pass the request to the next component in the pipeline. Perform actions before and/or after the next component executes. ⚙️ 𝑾𝒉𝒂𝒕 𝑨𝒓𝒆 𝑹𝒆𝒒𝒖𝒆𝒔𝒕 𝑫𝒆𝒍𝒆𝒈𝒂𝒕𝒆𝒔? Request delegates process HTTP requests and they’re configured using Use, Map, and Run. Here’s how they differ: 🔁 𝐔𝐬𝐞 – 𝐂𝐡𝐚𝐢𝐧 Use lets you chain multiple delegates together. You get a next parameter, and you can choose whether to call it or not. ✅ If you skip next(), the pipeline ends there — this is called short-circuiting. ⛔ 𝐑𝐮𝐧 – 𝐄𝐧𝐝 𝐭𝐡𝐞 𝐏𝐢𝐩𝐞𝐥𝐢𝐧𝐞 Run is a terminal middleware. It does not receive a next parameter and stops the pipeline when called. A̳n̳y̳ ̳m̳i̳d̳d̳l̳e̳w̳a̳r̳e̳ ̳r̳e̳g̳i̳s̳t̳e̳r̳e̳d̳ ̳a̳f̳t̳e̳r̳ ̳R̳u̳n̳ ̳w̳i̳l̳l̳ ̳n̳o̳t̳ ̳b̳e̳ ̳e̳x̳e̳c̳u̳t̳e̳d̳.̳ 🌳 𝐌𝐚𝐩 – 𝐁𝐫𝐚𝐧𝐜𝐡 𝐭𝐡𝐞 𝐏𝐢𝐩𝐞𝐥𝐢𝐧𝐞 If you need to branch the pipeline, you can use Map. What is branching?  It is used like a convention. For instance, if the request path starts with the given path, the branch is executed.   This is great for modularizing your app and handling specific routes differently. 💬 Which one do you use most often? And did you learn something new today? Let’s discuss in the comments 👇 #dotnet #aspnetcore #middleware #csharp #backend #webdevelopment #programming

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Deadlock in Async Programming — Why it can still happen with async/await? Many developers assume that using async/await guarantees immunity from deadlocks. Unfortunately, that’s not always true — especially in UI applications (WinForms, WPF) or the legacy ASP.NET SynchronizationContext. The Problem: The most common mistake is calling an async method synchronously, like this: var result = GetDataAsync().Result; // or .Wait() What happens behind the scenes: The UI or request thread blocks, waiting for the async call to complete. The async method tries to resume on the same thread/context after the await. That thread is already blocked → Deadlock! The Solution Always use await instead of .Result or .Wait(). For library or non-UI code: var result = await GetDataAsync().ConfigureAwait(false); This prevents context capture, avoids deadlocks, and often improves performance. Pro Tips: In ASP.NET Core, there’s no SynchronizationContext by default → fewer deadlocks. In UI apps, never block the UI thread — keep async flow end-to-end. Use ConfigureAwait(false) consistently in reusable libraries. Have you ever run into a deadlock caused by Task.Result or Wait() in your projects? How did you solve it? #DotNet #CSharp #AsyncProgramming #Deadlock #Concurrency #Multithreading #SoftwareDevelopment #CodingBestPractices

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𝗕𝗲𝘀𝘁 .𝗡𝗘𝗧 𝗧𝗼𝗼𝗹𝘀 & 𝗣𝗮𝗰𝗸𝗮𝗴𝗲𝘀 𝗘𝘃𝗲𝗿𝘆 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝗦𝗵𝗼𝘂𝗹𝗱 𝗞𝗻𝗼𝘄! The .NET ecosystem is huge, and choosing the right tools can save you 𝘁𝗶𝗺𝗲, 𝗲𝗳𝗳𝗼𝗿𝘁, 𝗮𝗻𝗱 𝗵𝗲𝗮𝗱𝗮𝗰𝗵𝗲𝘀. That’s why I have created this list of the 𝗺𝗼𝘀𝘁 𝗽𝗼𝗽𝘂𝗹𝗮𝗿 𝗮𝗻𝗱 𝘂𝘀𝗲𝗳𝘂𝗹 .𝗡𝗘𝗧 𝘁𝗼𝗼𝗹𝘀 & 𝗹𝗶𝗯𝗿𝗮𝗿𝗶𝗲𝘀 across different categories: 🔐 𝗔𝘂𝘁𝗵𝗲𝗻𝘁𝗶𝗰𝗮𝘁𝗶𝗼𝗻 – JWT, IdentityServer, OpenIddict, Duende, Ocelot, OAuth 🗄️ 𝗢𝗥𝗠 – EF Core, Dapper, NHibernate, Marten, OrmLite, PetaPoco 🧪 𝗧𝗲𝘀𝘁𝗶𝗻𝗴 – xUnit, NUnit, MSTest, FluentAssertions, Moq, Bogus 📜 𝗟𝗼𝗴𝗴𝗶𝗻𝗴 – Serilog, NLog, log4net, Elastic APM, Seq, Splunk ⚙️ 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀 – ASP.NET Core, Blazor, MAUI, Xamarin, Orleans, gRPC ⏳ 𝗕𝗮𝗰𝗸𝗴𝗿𝗼𝘂𝗻𝗱 𝗣𝗿𝗼𝗰𝗲𝘀𝘀𝗶𝗻𝗴 – Hangfire, Quartz.NET, MassTransit, RabbitMQ, Azure Service Bus, MediatR 📊 𝗥𝗲𝗽𝗼𝗿𝘁𝗶𝗻𝗴 – DinkToPdf, QuestPDF, iText7, DevExpress, SyncFusion, Stimulsoft 🎨 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗨𝗜 – MudBlazor, Blazorise, Radzen, Syncfusion UI, Telerik UI, LiveCharts2 💡 These tools are not just “nice-to-have” — they are the 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝗯𝗹𝗼𝗰𝗸𝘀 behind modern, scalable, and maintainable .NET applications. 👉 Which ones are your go-to in real projects? 👉 Any favorites I missed that you think should be on the list? 𝗡𝗼𝘁𝗲: Some tools in this list may overlap categories. For example:  • MediatR → not a scheduler like Hangfire/Quartz, but often used for in-process workflows (notifications, commands, async operations).  • gRPC → technically a framework/protocol, but I grouped it under Platforms for simplicity.  • Ocelot → commonly used as an API Gateway in .NET microservices. 👉 The intention of this list is not strict classification, but to highlight the most useful and widely adopted tools that real projects rely on. #dotnet #csharp #programming #developers #softwareengineering

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🎯 Design Best Practices In .NET C# ✅ After working for some reasonable period of time in the Software field, day by day you would get more confident that there is still something new you are not aware of, yet. Depending on your exposure to different kinds of projects and requirements, you would harness new skills. However, in my humble opinion, the most precious skills are the Analytical and Design skills. Don’t get me wrong, we all know that at the end of the day there is some code to write and someone would eventually do it. However, writing the code is something you could learn from an online -or offline- documentation or a tutorial. On the other hand, Analytical and Design skills are different… In this article we are going to explore some Design Best Practices that are practically proved to be efficient. 🔍 Topics to Look Out For ⭐ Unified Return Object ⭐ Don’t Abuse DI/IoC/Containers ⭐ Delegating Controlling How To Fire Events ⭐ The Snapshot Structure ⭐ Immutability ⭐ Paging and Partitioning ⭐ Delegates over Func<> ⭐ String.GetHashCode Nightmare ⭐ Separate State from Behavior ⭐ Not Using IoC Containers is Not an Excuse ⭐ Wrap Static Objects & Third Parties ⭐ Best Practice When Using Timers ⭐ Avoid Code Hidden Intentions ⭐ Defining Non-Generic Interface beside the Generic One 💡 What’s one design best practice you admire the most? Don't let it stop here, repost and share ♻️ with your network to spread the knowledge ✅ https://lnkd.in/gKdas9gX #dotnet #csharp #coding #code #programming #bestpractices #devcommunity #computerscience #softwaredesign #softwaredevelopment #softwareengineering #softwarearchitecture

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🟦 Reviewing Essential C# Concepts — My Dev Checklist Hey folks! 👋 I've been refreshing my C# fundamentals lately, so here’s a quick review of the key concepts every .NET dev should master — whether you’re getting ready for a new project, an interview, or just want to feel more confident in your daily coding. 💡 Dependency Injection (DI) DI helps decouple components and makes your code more testable and maintainable. Why use it? Allows easy swapping of implementations, makes unit testing much simpler, and follows SOLID (especially Dependency Inversion). 💡 Interface vs Abstract Class Interface: Only method signatures and properties, no implementation. Abstract Class: Can have both abstract members and concrete methods. Use interfaces for unrelated classes that share behavior, abstract classes for related ones that share code. 💡 Handling Large Data Files / Memory Management Use streams to process big files chunk by chunk, instead of loading everything into memory. For bulk inserts, Dapper/raw ADO.NET is often better than Entity Framework. Always dispose unmanaged resources! 💡 Efficient File Streaming in C# Don’t load everything into memory! Streaming processes data in small parts, preventing crashes or slowdowns. Always Dispose streams and, for async, use ReadLineAsync() in C# 8+. 💡 LINQ & Lambdas LINQ makes data querying expressive. Lambdas (x => x.Property) are great for filtering and chaining operations. 💡 Async & Await Write non-blocking code for I/O. Avoid .Result or .Wait() on async calls to prevent deadlocks. 💡 Exception Handling Use try/catch/finally for errors. Prefer global exception handling via middleware (like IExceptionHandler) in ASP.NET Core. 💡 BONUS: SOLID Principles & Clean Code Aim for code that is Simple, Organized, Loose, Isolated, and Descriptive. SOLID principles make your code easier to scale and maintain. 🟨 My Golden Tip: Don’t just read these concepts — implement code samples, break things on purpose, and debug your way through! Real learning happens by doing. Helpful Docs & References: Dependency Injection: https://lnkd.in/dGaxgAGk Interfaces vs Abstract Classes: https://lnkd.in/d9hXtZys Working with Streams: https://lnkd.in/dNgS3fNB Async Programming: https://lnkd.in/dH9SpFqF Global Exception Handling: https://lnkd.in/dJ5EwAtV SOLID Principles: https://lnkd.in/dAnEnfA4 ✨ Which C# concept do you think is most underrated — or the trickiest for real-world apps? Drop your thoughts or tips below! 👇 #CSharp #DotNet #Backend #Coding #Learning #WebDev #Career #Programming

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