OpenAI Codex CLI Tutorial for C#: Build a .NET 10 API
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This OpenAI Codex CLI tutorial shows OpenAI Codex for C# developers in practice: how an AI coding agent can inspect a repository, implement ...
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C#
Claude Code vs GitHub Copilot for ASP.NET Core Developers
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If you write C# for a living, the question is no longer whether to try an AI coding tool. The real decision is which workflow fits the way y...
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How to Export a DataTable to CSV in C#
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In this article i will explain how to export DataTable to CSV in C# without third-party tools: write the column names as a header row, wrap ...
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Read CSV File in ASP.NET Core & Web Forms (C#, VB.NET)
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To read a CSV file in ASP.NET, accept the upload, parse it with a real CSV parser, validate each record, and show the rows in a ...
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Merge Multiple PDF Files Into Single PDF Using Itextsharp in C#
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Introduction To merge multiple PDF files into one using iTextSharp in C#, you create a Document , attach a P...
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Secure JWT Authentication with HttpOnly Refresh Tokens in ASP.NET Core Web API
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The short answer: Don't store JSON Web Tokens (JWTs) in localStorage , because any JavaScript running on your page can read them. In AS...
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Upgrade to .NET 10 from .NET 8/9: Common Build Errors, Breaking Changes, and How to Fix Them
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The short answer: To upgrade to .NET 10 from .NET 8 or 9, install the .NET 10 SDK, change your target framework moniker (TFM) to net...
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C# Records vs Classes vs Structs: Which Should You Use?
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Every C# codebase eventually forces this decision: should this type be a class, a struct, or a record? The question looks trivial until...
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Export a List to CSV in C# (CsvHelper and StreamWriter Examples)
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Data portability is a requirement for almost every business application. Whether you are building an admin dashboard, a reporting tool, or a...
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Angular 22 CRUD Example with ASP.NET Core Web API and .NET 10
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In this article, we will build a CRUD (Create, Read, Update, Delete) application with Angular, an ASP.NET Core Web API and a SQL Server data...
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Convert List to CSV in C# With Example
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To convert a list to CSV in C#, use CsvWriter.WriteRecords from CsvHelper, or write a header and one escaped row per object with plain .NET...
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How to Secure an ASP.NET Core Deployment on Linux (Nginx & Systemd)
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If you want to secure a .NET Core deployment on Linux, the short answer is this: never expose Kestrel directly to the internet, put a r...
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Secure ASP.NET Core Web API JWT Authentication
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If you've already wired up JWT bearer authentication in an ASP.NET Core Web API, you've solved maybe a third of the actual security ...
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EF Core Query Performance: AsNoTracking, Loading & N+1
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Most EF Core performance problems don't announce themselves. You write clean LINQ, the app works fine locally against a small seed datab...
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How to Export a DataTable to CSV in C# and VB.NET (Escaping, UTF-8, Streaming)
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If you need to export a DataTable to a CSV file in C# or VB.NET, the tricky part isn't writing the rows it's escaping the values c...
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Multi-Select Dropdown with Checkboxes in ASP.NET Web Forms
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A standard HTML <select multiple> control lets users choose multiple items, but the interaction is awkward: on Windows, users have to...
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