Meziantou.Framework: a hundred small .NET packages instead of one big one

A collection, not a framework in the usual sense

The README describes Meziantou.Framework as a comprehensive collection of utility libraries designed to enhance development in the .NET ecosystem, providing a wide range of tools and functionalities that simplify tasks across various domains, including ASP.NET Core, Blazor, WPF and Win32 APIs. The repository description adds the framing that matters for adoption: more than 100 focused NuGet packages, and you pick only the pieces you need instead of rewriting the same helpers in every project. So the name suggests a framework and the reality is a package collection with a shared author and a shared release process. That distinction is not pedantic. A framework gives you a dependency graph and a set of conventions you accept wholesale, while a package collection gives you a dependency list you assemble, one line at a time, each with its own version and its own upgrade cadence.

The package table is the documentation index

The bulk of the README is a table with three columns: name, version badge and readme link. Every row points at a readme inside the source tree, so the documentation lives next to the code rather than in one long document. The list starts with the ASP.NET Core group and shows the shape of the naming. There is Meziantou.AspNetCore itself, then Meziantou.AspNetCore.Authentication.HttpBasic for HTTP basic authentication, Meziantou.AspNetCore.Components with a LogViewer and a WebAssembly variant underneath it, Meziantou.AspNetCore.Mvc, and Meziantou.AspNetCore.ServiceDefaults with an AutoRegister companion. The pattern is a dotted path that encodes the stack a package targets and the specific concern it addresses, which is a reasonable convention for a namespace as well as a package identifier.

The Meziantou.Framework packages are a grab bag on purpose

The rest of the table shows how varied the core set is, and the variety is the point. There is Meziantou.Framework.AnsiFormatting for terminal escape sequences, Meziantou.Framework.Assertions for test assertions, Meziantou.Framework.AtlassianDataFormat with a separate tool package alongside it, Meziantou.Framework.Avatar for gravatar images, Meziantou.Framework.Bcrypt for password hashing, Meziantou.Framework.Bencode for the Bencode encoding, and Meziantou.Framework.BloomFilters. Then Meziantou.Framework.ByteSize for human-readable sizes, Meziantou.Framework.ChromiumTracing, Meziantou.Framework.CodeDom, Meziantou.Framework.CodeOwners, Meziantou.Framework.CommandLine for argument parsing, and Meziantou.Framework.Csv. Then Meziantou.Framework.DependencyScanning. Read as a list, this is one author's accumulated answer to problems that recur in every .NET project, and each entry is small enough to be understood by reading the package rather than by adopting a framework.

Logging, DNS and the pieces outside the web stack

Not everything is a general-purpose utility. The Meziantou.Extensions.Logging group is its own family, with a FileLogger package, an InMemory package and one for Xunit v3 specifically, which is a logging sink for tests. That last one is the kind of package nobody writes for themselves and everybody ends up needing. Meziantou.DnsProxy sits on its own with no Meziantou.Framework prefix, which suggests it is a distinct concern rather than a general helper: a DNS proxy is infrastructure rather than a convenience, and the naming reflects that the package does not share the framework's namespace root. The framework root package Meziantou.Framework appears in the list with no readme link, as does Meziantou.AspNetCore.ServiceDefaults.AutoRegister, and those two are the entries where you would have to look at the source or the package page rather than a document.

The samples directory is the map of the Win32 surface

The samples directory at the repository root is the best inventory of what the Win32 packages actually do. There are BlazorAppSample and DependencyScannerSample, a WPF set that includes CollectionSamples, EnumComboBox, Imaging.Samples, Scheduling.RecurrenceRuleSample and WebPlatform.ScreenshotSample, and a run of console samples for the Win32 packages: AccessTokenConsole, ChangeJournal.Sample, CredentialManagerConsole, DialogsSamples and RecentDocumentsConsole, plus SingleInstanceConsoleAppSample. Read those names as a feature list for the platform interop layer. The Windows security API, the change journal, the credential manager, common dialogs, the recent documents list and single instance detection are all things a .NET developer needs occasionally and none of which the BCL exposes.

How the repository is laid out for a hundred packages

The top-level listing shows the machinery a multi-package repository needs. There is a Meziantou.Framework.slnx solution file, plus an slnx directory, so the solutions are managed through the newer XML format rather than the old one. Directory.Build.props and Directory.Build.targets sit at the root, which is how shared metadata, package versions and analysis settings reach every project without being repeated. The eng directory is the engineering infrastructure, tooling for builds and releases, and build.sh is the build entry point. There is a benchmarks directory, so at least some packages are measured rather than assumed to be fast, and a fuzz directory, which is unusual outside of parsing and native interop code and is a strong signal about where the risk sits. ref is the reference assemblies area, common holds shared code, tools is the tooling, and tests and samples sit alongside src.

Where Meziantou.Framework is the wrong choice

Four limits apply. With no cohesive API surface there is no consistency guarantee between packages, so two Meziantou packages may not agree about naming, nullability or target framework, and a project that adopts five of them adopts five independent upgrade tracks. A hundred packages from one author is also a supply chain concentration that is easy to overlook, because the packages are small and each looks harmless, but a service that references thirty of them depends on thirty separate releases. The per-package documentation means the reading burden is paid package by package rather than once. And there is no sign in the repository of a GitHub release stream, so the version history of the packages lives on NuGet rather than in the repository, which means the changelog for the piece you depend on is somewhere else. The licence is MIT and the repository is MIT, which is a genuine advantage over the alternatives, but it is a licence on code rather than a maintenance commitment.

Editorial conclusion

Use Meziantou.Framework when you keep rewriting the same helper, whether that is a Win32 call, an assertion helper or an ASP.NET Core component, because the packages are individually published and individually documented so you can take one. Do not add the umbrella Meziantou.Framework package expecting one reference to cover everything, since the whole point of the layout is that you pick the pieces. Verify first which package covers your case, since the package names are the index and the readme lives per package, that the target framework of the package you want matches your project, and that you read the per-package readme rather than the repository README, which is a table of links and tells you almost nothing about behaviour.

Frequently asked questions

Official sources

1. Issues
2. License: MIT
3. meziantou/Meziantou.Framework on GitHub
4. Project website
5. README