# DapperLib/Dapper

Dapper - a simple object mapper for .Net

Repository: https://github.com/DapperLib/Dapper
Canonical: https://ross.abutalabs.com/products/dapper
Homepage: https://www.learndapper.com/
Language: C#
License: NOASSERTION
License Family: other
Topics: dapper, sql, ado-net
Last push: 2026-08-20T14:20:52+00:00

## Health v2 (maintenance only)
Score: 82/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 52, longevity 100
- inputs: {"age_days": 5620, "days_push": 13, "days_rel": 109, "gap_med": 231.5, "n_releases_24m": 3}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 18373, forks 3669 (observed 2026-08-28T04:11:26.604776+00:00)

## What it is
Dapper is a lightweight micro-ORM for .NET that maps ADO.NET query results to strongly-typed objects. It lets developers execute raw SQL and stored procedures with high performance and minimal boilerplate.

## Use cases
- map sql query results to c# objects
- execute raw sql with ado.net without boilerplate
- fast lightweight data access in .net
- call stored procedures and map results
- run parameterized queries safely
- batch multiple queries into one database call

## When to choose
- you want raw sql control with object mapping in .NET
- performance matters more than full ORM features
- you want a lightweight alternative to Entity Framework
- you need async and batched query support

## When to avoid
- you want change tracking, migrations, or LINQ queries
- you prefer a full-featured ORM generating sql for you
- you are not on a .NET language

## Facets
- artifact type: library
- maturity: stable
- function: orm, database, database-driver, serialization
- domain: databases, backend, web-development, developer-tools
- platform: dotnet, cross-platform, windows
- tags: micro-orm, ado-net, sql, c-sharp, nuget, object-mapper, linux, macos

## Member repositories
- DapperLib/Dapper (main) score 82

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:26.604776+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 2026-08-29T17:02:04.014160+00:00, confidence not recorded.
  - readme: https://github.com/DapperLib/Dapper (fetched 2026-08-28T04:11:26.604776+00:00, sha 702f5d1b4877)
  - homepage: https://www.learndapper.com/ (fetched 2026-08-29T07:59:45.141492+00:00, sha d0d1566aaf6d)
- Data as of 2026-08-30T08:39:29.467469+00:00.