This blog post is part of The C# Advent Calendar 2025, a series of 50 posts about C#. Be sure to check out the rest of the blog posts in the calendar! Over the years, I've relied on Meziantou.DotNet.CodingStandard, a NuGet package, to establish a consistent baseline across all my .NET projects. This approach includes style enforcement, essential analyzers, sensible build defaults, and additional tooling.… [read more]

If you frequently need to work on multiple branches simultaneously, consider using Git Worktree to maintain separate working directories for each branch, eliminating IDE reloads entirely. When you need to switch to a branch that is not up to date with the remote branch, the typical workflow involves switching to that branch and pulling the latest changes. This process can be time-consuming and disruptive… [read more]

Many .NET projects use well-known GUIDs as identifiers for activities, interop scenarios, database keys, and other purposes. It's common to see code like new Guid("01234567-8901-2345-6789-012345678901") throughout applications. While this approach is readable and straightforward, it comes with a hidden performance cost that can impact application startup time. This is a micro-optimization that primarily… [read more]

C# has long supported extension methods, allowing developers to add new methods to existing types without modifying the original type. However, this capability was limited to instance methods. With C# 14, the language introduces extension members, significantly expanding what you can extend. You can now add extension properties and extension static methods to existing types. This enhancement is… [read more]

When working across multiple Git repositories, you often need different configurations for each context. For example, you might use your personal email for open-source contributions and your work email for company projects. While you can configure Git globally or per repository, managing these settings manually becomes tedious and error-prone. Git's conditional includes feature solves this problem by… [read more]

When working with file systems on Windows, understanding and controlling disk caching is crucial for ensuring data integrity and optimizing performance. Disk caching improves system performance by temporarily storing write operations in memory before committing them to disk. However, this also means that in case of power failure or system crash, data might be lost if it hasn't been flushed from cache to… [read more]

While Lazy<T> is the go-to solution for lazy initialization in .NET, there's a lesser-known alternative that can be more efficient in certain scenarios: LazyInitializer.EnsureInitialized. This static method provides thread-safe initialization with some key characteristics: Reference types only: Only works with classes, not value types Null-based detection: Uses null to determine if initialization is… [read more]

A colleague recently asked me an interesting question: "Why does Type.FullName return null in certain situations?" Indeed, the method signature is public abstract string? FullName { get; } This behavior might seem unexpected, but there are specific scenarios where the .NET runtime cannot generate a valid full name for a type. Here are the two main cases where Type.FullName returns null: Generic Types with… [read more]

When working with network programming in .NET, you might need to find an available port on your system. This is particularly useful when creating server applications, running tests, or developing tools that need to bind to a network port without conflicts. Here's a simple way to get an available port using the Socket class: Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream,… [read more]

When working with Git repositories, you often encounter URLs in HTTPS format, especially when cloning from GitHub, GitLab, or other hosting services. However, if you prefer using SSH for authentication (which is often more convenient with key-based auth), manually changing URLs can be tedious. Also, it can be even harder when dealing with submodules. Git's insteadOf configuration option provides an… [read more]