Nextended.NET libraries that stay out of your way

Extension methods and custom types, expression-based caching, EF Core graph loading, permission-aware response shaping, a Roslyn source generator and eight .NET Aspire hosting integrations. Independent packages on one small foundation.

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All packages

Source

Map objects without a mapper

Convention-based mapping needs no profile registration. Explicit assignments, ignored members and type converters compose on a settings object when the conventions are not enough.

Class mapping

Types that carry their meaning

Money keeps an amount and its currency together at decimal precision. Date is a date with no time component, which removes the "which midnight in which zone" class of bug outright.

Custom types

Cache keys you never write

Hand over the call you would have made and the key is derived from the declaring type, the method name and the actual argument values. Two call sites can no longer disagree.

Caching

EF Core without Include chains

Walk navigations from a loaded entity, include everything minus named paths, or declare a reusable include definition once and hand it to every query that needs it.

Entity Framework

One response, many audiences

A declarative filter per DTO redacts, masks, rounds, truncates, hashes, prunes and even renames keys before serialization — per request, per user, per permission.

Response filters

Four generators, one config file

DTOs and mapping extensions from your entities, typed classes from JSON and XML, lookup tables from Excel, and documentation from source files. The sample project checks its own generated output in.

Source generation

An AppHost without if-cascades

Every conditional builder call applies its step when the condition holds and returns the builder untouched when it does not, so the chain stays one chain instead of branching into duplicates.

.NET Aspire

Whole stacks as one resource

Supabase, n8n, Grafana with its observability stack, a browser database studio, the visual AppHost builder, self-hosted multimodal AI and PHP endpoints — each with a runnable sample AppHost.

Hosting integrations

Nothing when nothing applies

The response pipeline analyses a response's type graph once and skips the entire walk when no registered filter can reach it. Metadata-driven property selection resolves at build time, not per request.

How it stays cheap

The packages

Generated from one file

This listing, the sidebar and the tables in every README all come from docs/data/packages.json. Adding a package there updates every one of them, so they cannot drift apart.

Core libraries

Package	Description	Sample
Nextended.Core	Foundation library — extension methods, custom types (Money, Date, BaseId, SuperType), class mapping, deep clone, encryption, hashing and the code-generation attributes.	—
Nextended.Cache	Expression-based caching — automatic cache keys from method expressions, CacheProvider with condition-based invalidation, thread-safe AddOrGetExisting.	—

Data access

Package	Description	Sample
Nextended.EF	Entity Framework Core extensions — graph loading (LoadGraphAsync, IncludeAll, MultiInclude), declarative include definitions, paging, dynamic sorting and bulk operations.	—

ASP.NET Core & web

Package	Description	Sample
Nextended.Web	ASP.NET Core utilities — zero-config OData (AddODataAuto), composable IQueryable OData appliers, strongly typed controller URLs, streaming download helpers and a background executor that can replay a captured request.	—
Nextended.ResponseFilters	Fluent, provider-agnostic pipeline that redacts, masks, rounds, truncates, hashes, prunes and restructures response DTOs before serialization — per request, per user, per permission.	—
Nextended.ResponseFilters.AspNetCore	ASP.NET Core adapter for Nextended.ResponseFilters — registers the pipeline as a global IAsyncResultFilter and replays structural edits against the serialized JSON tree.	—

UI libraries

Package	Description	Sample
Nextended.Blazor	Blazor helpers — IBrowserFile extensions (bytes, data URLs, downloads), a hierarchical model for browsing inside uploaded zip/tar/rar archives, MIME-type detection and component-parameter reflection.	—
Nextended.UI	WPF and Windows desktop helpers — a global input-binding manager with hold/sequence matching, DirectInput and XInput gamepad readers, key-bind capture controls, converters, behaviours, markup extensions and runtime-defined PropertyGrid types.	—

Code generation & tooling

Package	Description	Sample
Nextended.Imaging	Image processing — aspect-preserving resize, crop, colour replacement, brightness-based foreground picking, thumbnail generation, byte/data-URL conversion and MIME detection from magic bytes.	—
Nextended.CodeGen	Roslyn source generator — DTOs and interfaces from your entities, strongly typed classes from JSON/XML, lookup tables from Excel, and documentation from source files.	CodeGenSample

.NET Aspire hosting

Package	Description	Sample
Nextended.Aspire	Conditional AppHost builder extensions — WithReferenceIf / WaitForIf / WithExplicitStartIf, strongly typed environment variables from config objects, HTTPS dev-cert wiring, Docker guards, GitHub-source resources and npm app discovery.	—
Nextended.Aspire.Hosting.Supabase	The complete Supabase stack — Postgres, Auth (GoTrue), REST, Realtime, Storage, Studio, Kong and Edge Functions — as one composable Aspire resource.	Supabase.AppHost
Nextended.Aspire.Hosting.N8n	The n8n workflow-automation platform as an Aspire resource, with Postgres persistence, workflow import and a typed client for triggering workflows from .NET.	N8n.AppHost
Nextended.Aspire.Hosting.Grafana	Grafana, Prometheus, Loki, Tempo, Promtail, cAdvisor, postgres_exporter and the OpenTelemetry Collector as composable resources with auto-provisioned datasources.	Grafana.AppHost
Nextended.Aspire.Hosting.WebDataStudio	WebDataStudio — a browser database studio for PostgreSQL, MySQL, SQL Server, SQLite, Oracle, DuckDB, ClickHouse, MongoDB and Redis — wired to the databases of your stack, with accounts and roles, an optional SQL assistant, and an MCP endpoint for AI agents.	WebDataStudio.AppHost
Nextended.Aspire.Hosting.AspireUI	AspireUI — the visual AppHost builder — as a resource inside your own Aspire stack, with an optional pre-seeded admin user and a starter stack built from your project paths.	AspireUI.AppHost
Nextended.Aspire.Hosting.LocalAI	Self-hosted, OpenAI-compatible multimodal AI — image generation, text-to-speech, speech-to-text and video — with gallery model management, GPU support and Open WebUI.	AiStack.AppHost
Nextended.Aspire.Hosting.Php	Run PHP endpoints inside your Aspire stack — a docroot folder or a single router script served by PHP's built-in web server, with php.ini settings as fluent options.	Php.AppHost
Nextended.Aspire.Hosting.DbTools	Database tools for an Aspire app host. The first: fill a database resource from a database that already exists — schema and data — from another resource in the stack or from a server it does not model. PostgreSQL, SQL Server, MySQL/MariaDB, MongoDB and Redis, each through its own engine's dump and restore tools.	DbTools.AppHost

The package overview adds target frameworks, platforms, dependencies and the dependency graph.

Quick start

bash

dotnet add package Nextended.Core

csharp

using Nextended.Core.Extensions;
using Nextended.Core.Types;
using Nextended.Core.DeepClone;

// Object mapping — no profiles, no configuration
var userDto = user.MapTo<UserDto>();
var userDtos = users.MapElementsTo<UserDto>();

// Deep clone, references preserved
var copy = order.CloneDeep();

// Types that carry their meaning
var price = new Money(99.99m, Currency.USD);
var due   = Date.Today.AddDays(30);

// Extension methods
"hello world".ToPascalCase();     // "HelloWorld"
"hello world".ToCamel();          // "helloWorld"
"MyClassName".SplitByUpperCase(); // "My Class Name"
DateTime.Today.AddWeekDays(5);    // skips weekends

Runnable samples

Every Aspire integration and the source generator ship with a project you can start:

CodeGenSample — Nextended.CodeGen
Supabase.AppHost — Nextended.Aspire.Hosting.Supabase
N8n.AppHost — Nextended.Aspire.Hosting.N8n
Grafana.AppHost — Nextended.Aspire.Hosting.Grafana
WebDataStudio.AppHost — Nextended.Aspire.Hosting.WebDataStudio
AspireUI.AppHost — Nextended.Aspire.Hosting.AspireUI
AiStack.AppHost — Nextended.Aspire.Hosting.LocalAI
Php.AppHost — Nextended.Aspire.Hosting.Php
DbTools.AppHost — Nextended.Aspire.Hosting.DbTools

Migrating from nExt

This suite was previously published as nExt. Namespaces moved from nExt.* to Nextended.*; the API is otherwise source-compatible. See the migration guide. The legacy nExt.Core package is no longer maintained.