# MarimerLLC/csla

A home for your business logic in any .NET application.

Repository: https://github.com/MarimerLLC/csla
Canonical: https://ross.abutalabs.com/products/csla
Homepage: https://cslanet.com
Language: C#
License: MIT
License Family: permissive
Topics: csla, windows-forms, wpf, blazor, netstandard, asp-net, asp-net-core, asp-net-mvc, web-forms, windowsforms, winforms, aspnetcore, aspnet, webassembly, maui, csharp
Last push: 2026-08-24T22:20:02+00:00

## Health v2 (maintenance only)
Score: 88/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 66, longevity 100
- inputs: {"age_days": 4955, "days_push": 9, "days_rel": 149, "gap_med": 62.0, "n_releases_24m": 9}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1344, forks 400 (observed 2026-08-28T04:04:27.133820+00:00)

## What it is
CSLA .NET is a software development framework for building a reusable, maintainable object-oriented business logic layer in .NET applications. It supports 1-, 2-, and n-tier architectures with mobile objects, running across Windows, web, service, and mobile platforms including Blazor, MAUI, WPF, and WinForms.

## Use cases
- build a reusable business logic layer for .NET apps
- share business objects between server and client in an n-tier architecture
- create maintainable object-oriented domain models in C#
- build line-of-business apps with Blazor or MAUI
- abstract data persistence behind business objects
- separate business rules from UI across desktop and web frontends

## When to choose
- you want a proven, long-established framework for object-oriented business layers in .NET
- your app spans multiple UIs (web, desktop, mobile) sharing the same business logic
- you need flexible n-tier deployment with mobile objects
- you want business objects with built-in validation, authorization, and persistence support

## When to avoid
- you prefer lightweight micro-ORM or DDD-style hand-rolled domain models
- you work outside the .NET ecosystem
- you want a minimal framework without its conventions and base classes
- your team is unwilling to learn CSLA's object model and patterns

## Facets
- artifact type: framework
- maturity: stable
- function: web-framework, middleware, serialization, state-management
- domain: web-development, backend, desktop-applications, mobile-development, cross-platform, developer-tools
- platform: dotnet, windows, cross-platform, cloud
- tags: business-logic, object-oriented-business-layer, blazor, maui, winforms, wpf, n-tier-architecture, mobile-objects, data-persistence, macos, linux, web-server, mobile, desktop, docker

## Member repositories
- MarimerLLC/csla (main) score 88

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:27.133820+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:42:48.387205+00:00, confidence not recorded.
  - readme: https://github.com/MarimerLLC/csla (fetched 2026-08-28T04:04:27.133820+00:00, sha c94ea5fe93ab)
  - homepage: https://cslanet.com (fetched 2026-08-29T12:02:03.417982+00:00, sha 732fc38912a6)
  - site_page: https://cslanet.com/10.0.0/html/index.html (fetched 2026-08-29T12:02:03.427137+00:00, sha 3fbec7a36025)
  - site_page: https://cslanet.com/5.4.2/html/index.html (fetched 2026-08-29T12:02:03.429093+00:00, sha da7d128310e9)
- Data as of 2026-08-30T08:39:29.467469+00:00.